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Finding the Fourth Proportional to 487,751.20, 731,626.80 and 399,104.80

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Solution

The fourth proportional to 487,751.20, 731,626.80 and 399,104.80 is: 598,657.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,751.20 : 731,626.80 = 399,104.80 : x
  2. Step 2: Convert to fraction form
    487,751.20/731,626.80 = 399,104.80/x
  3. Step 3: Cross multiply
    487,751.20x = 731,626.80 × 399,104.80
  4. Step 4: Simplify right side
    487,751.20x = 291,995,767,688.64
  5. Step 5: Solve for x
    x = 291,995,767,688.64/487,751.20
  6. Step 6: Final answer
    x = 598,657.20

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Similar ratio
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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.