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Finding the Fourth Proportional to 400.71, 552.78 and 253.29

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Solution

The fourth proportional to 400.71, 552.78 and 253.29 is: 349.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.71 : 552.78 = 253.29 : x
  2. Step 2: Convert to fraction form
    400.71/552.78 = 253.29/x
  3. Step 3: Cross multiply
    400.71x = 552.78 × 253.29
  4. Step 4: Simplify right side
    400.71x = 140,013.65
  5. Step 5: Solve for x
    x = 140,013.65/400.71
  6. Step 6: Final answer
    x = 349.41

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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.