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Finding the Fourth Proportional to 399,727.71, 551,607.87 and 218,445.76

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Solution

The fourth proportional to 399,727.71, 551,607.87 and 218,445.76 is: 301,446.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,727.71 : 551,607.87 = 218,445.76 : x
  2. Step 2: Convert to fraction form
    399,727.71/551,607.87 = 218,445.76/x
  3. Step 3: Cross multiply
    399,727.71x = 551,607.87 × 218,445.76
  4. Step 4: Simplify right side
    399,727.71x = 120,496,401,892.81
  5. Step 5: Solve for x
    x = 120,496,401,892.81/399,727.71
  6. Step 6: Final answer
    x = 301,446.21

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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.