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Finding the Fourth Proportional to 399,687.84, 551,585.28 and 229,921.92

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Solution

The fourth proportional to 399,687.84, 551,585.28 and 229,921.92 is: 317,301.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,687.84 : 551,585.28 = 229,921.92 : x
  2. Step 2: Convert to fraction form
    399,687.84/551,585.28 = 229,921.92/x
  3. Step 3: Cross multiply
    399,687.84x = 551,585.28 × 229,921.92
  4. Step 4: Simplify right side
    399,687.84x = 126,821,546,621.34
  5. Step 5: Solve for x
    x = 126,821,546,621.34/399,687.84
  6. Step 6: Final answer
    x = 317,301.49

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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.