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Finding the Fourth Proportional to 440,147.10, 660,220.65 and 287,931.90

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Solution

The fourth proportional to 440,147.10, 660,220.65 and 287,931.90 is: 431,897.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,147.10 : 660,220.65 = 287,931.90 : x
  2. Step 2: Convert to fraction form
    440,147.10/660,220.65 = 287,931.90/x
  3. Step 3: Cross multiply
    440,147.10x = 660,220.65 × 287,931.90
  4. Step 4: Simplify right side
    440,147.10x = 190,098,586,173.74
  5. Step 5: Solve for x
    x = 190,098,586,173.74/440,147.10
  6. Step 6: Final answer
    x = 431,897.85

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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.