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Finding the Fourth Proportional to 399.47, 551.09 and 244.13

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Solution

The fourth proportional to 399.47, 551.09 and 244.13 is: 336.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.47 : 551.09 = 244.13 : x
  2. Step 2: Convert to fraction form
    399.47/551.09 = 244.13/x
  3. Step 3: Cross multiply
    399.47x = 551.09 × 244.13
  4. Step 4: Simplify right side
    399.47x = 134,535.46
  5. Step 5: Solve for x
    x = 134,535.46/399.47
  6. Step 6: Final answer
    x = 336.79

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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.