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Finding the Fourth Proportional to 478,646.27, 717,976.89 and 141,721.10

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Solution

The fourth proportional to 478,646.27, 717,976.89 and 141,721.10 is: 212,583.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,646.27 : 717,976.89 = 141,721.10 : x
  2. Step 2: Convert to fraction form
    478,646.27/717,976.89 = 141,721.10/x
  3. Step 3: Cross multiply
    478,646.27x = 717,976.89 × 141,721.10
  4. Step 4: Simplify right side
    478,646.27x = 101,752,471,035.50
  5. Step 5: Solve for x
    x = 101,752,471,035.50/478,646.27
  6. Step 6: Final answer
    x = 212,583.86

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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.