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Finding the Fourth Proportional to 487,355.80, 731,033.70 and 345,638.20

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Solution

The fourth proportional to 487,355.80, 731,033.70 and 345,638.20 is: 518,457.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,355.80 : 731,033.70 = 345,638.20 : x
  2. Step 2: Convert to fraction form
    487,355.80/731,033.70 = 345,638.20/x
  3. Step 3: Cross multiply
    487,355.80x = 731,033.70 × 345,638.20
  4. Step 4: Simplify right side
    487,355.80x = 252,673,172,207.34
  5. Step 5: Solve for x
    x = 252,673,172,207.34/487,355.80
  6. Step 6: Final answer
    x = 518,457.30

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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.