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Finding the Fourth Proportional to 399,663.92, 551,529.80 and 218,371.92

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Solution

The fourth proportional to 399,663.92, 551,529.80 and 218,371.92 is: 301,349.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,663.92 : 551,529.80 = 218,371.92 : x
  2. Step 2: Convert to fraction form
    399,663.92/551,529.80 = 218,371.92/x
  3. Step 3: Cross multiply
    399,663.92x = 551,529.80 × 218,371.92
  4. Step 4: Simplify right side
    399,663.92x = 120,438,621,363.22
  5. Step 5: Solve for x
    x = 120,438,621,363.22/399,663.92
  6. Step 6: Final answer
    x = 301,349.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.