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Finding the Fourth Proportional to 515,162.69, 772,549.91 and 215,663.97

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Solution

The fourth proportional to 515,162.69, 772,549.91 and 215,663.97 is: 323,414.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,162.69 : 772,549.91 = 215,663.97 : x
  2. Step 2: Convert to fraction form
    515,162.69/772,549.91 = 215,663.97/x
  3. Step 3: Cross multiply
    515,162.69x = 772,549.91 × 215,663.97
  4. Step 4: Simplify right side
    515,162.69x = 166,611,181,152.90
  5. Step 5: Solve for x
    x = 166,611,181,152.90/515,162.69
  6. Step 6: Final answer
    x = 323,414.69

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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.