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Finding the Fourth Proportional to 991,996.80, 1,487,995.20 and 360,931.20

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Solution

The fourth proportional to 991,996.80, 1,487,995.20 and 360,931.20 is: 541,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,996.80 : 1,487,995.20 = 360,931.20 : x
  2. Step 2: Convert to fraction form
    991,996.80/1,487,995.20 = 360,931.20/x
  3. Step 3: Cross multiply
    991,996.80x = 1,487,995.20 × 360,931.20
  4. Step 4: Simplify right side
    991,996.80x = 537,063,893,130.24
  5. Step 5: Solve for x
    x = 537,063,893,130.24/991,996.80
  6. Step 6: Final answer
    x = 541,396.80

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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.