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Finding the Fourth Proportional to 478,481.65, 717,862.80 and 141,531.17

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Solution

The fourth proportional to 478,481.65, 717,862.80 and 141,531.17 is: 212,338.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,481.65 : 717,862.80 = 141,531.17 : x
  2. Step 2: Convert to fraction form
    478,481.65/717,862.80 = 141,531.17/x
  3. Step 3: Cross multiply
    478,481.65x = 717,862.80 × 141,531.17
  4. Step 4: Simplify right side
    478,481.65x = 101,599,958,924.90
  5. Step 5: Solve for x
    x = 101,599,958,924.90/478,481.65
  6. Step 6: Final answer
    x = 212,338.26

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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.