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Finding the Fourth Proportional to 487,519.90, 731,279.85 and 251,323.90

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Solution

The fourth proportional to 487,519.90, 731,279.85 and 251,323.90 is: 376,985.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,519.90 : 731,279.85 = 251,323.90 : x
  2. Step 2: Convert to fraction form
    487,519.90/731,279.85 = 251,323.90/x
  3. Step 3: Cross multiply
    487,519.90x = 731,279.85 × 251,323.90
  4. Step 4: Simplify right side
    487,519.90x = 183,788,103,893.42
  5. Step 5: Solve for x
    x = 183,788,103,893.42/487,519.90
  6. Step 6: Final answer
    x = 376,985.85

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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.