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Finding the Fourth Proportional to 1,079,809,985.40, 1,619,714,978.10 and 712,477,966.20

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Solution

The fourth proportional to 1,079,809,985.40, 1,619,714,978.10 and 712,477,966.20 is: 1,068,716,949.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079,809,985.40 : 1,619,714,978.10 = 712,477,966.20 : x
  2. Step 2: Convert to fraction form
    1,079,809,985.40/1,619,714,978.10 = 712,477,966.20/x
  3. Step 3: Cross multiply
    1,079,809,985.40x = 1,619,714,978.10 × 712,477,966.20
  4. Step 4: Simplify right side
    1,079,809,985.40x = 1,154,011,233,420,365,568
  5. Step 5: Solve for x
    x = 1,154,011,233,420,365,568/1,079,809,985.40
  6. Step 6: Final answer
    x = 1,068,716,949.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.