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Finding the Fourth Proportional to 839,809,990.40, 1,259,714,985.60 and 635,736,646.40

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Solution

The fourth proportional to 839,809,990.40, 1,259,714,985.60 and 635,736,646.40 is: 953,604,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,809,990.40 : 1,259,714,985.60 = 635,736,646.40 : x
  2. Step 2: Convert to fraction form
    839,809,990.40/1,259,714,985.60 = 635,736,646.40/x
  3. Step 3: Cross multiply
    839,809,990.40x = 1,259,714,985.60 × 635,736,646.40
  4. Step 4: Simplify right side
    839,809,990.40x = 800,846,980,365,168,256
  5. Step 5: Solve for x
    x = 800,846,980,365,168,256/839,809,990.40
  6. Step 6: Final answer
    x = 953,604,969.60

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Double scale
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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.