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Finding the Fourth Proportional to 487,908.10, 731,862.15 and 172,396.90

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Solution

The fourth proportional to 487,908.10, 731,862.15 and 172,396.90 is: 258,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,908.10 : 731,862.15 = 172,396.90 : x
  2. Step 2: Convert to fraction form
    487,908.10/731,862.15 = 172,396.90/x
  3. Step 3: Cross multiply
    487,908.10x = 731,862.15 × 172,396.90
  4. Step 4: Simplify right side
    487,908.10x = 126,170,765,887.34
  5. Step 5: Solve for x
    x = 126,170,765,887.34/487,908.10
  6. Step 6: Final answer
    x = 258,595.35

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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.