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Finding the Fourth Proportional to 456.71, 685.87 and 354.11

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Solution

The fourth proportional to 456.71, 685.87 and 354.11 is: 531.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.71 : 685.87 = 354.11 : x
  2. Step 2: Convert to fraction form
    456.71/685.87 = 354.11/x
  3. Step 3: Cross multiply
    456.71x = 685.87 × 354.11
  4. Step 4: Simplify right side
    456.71x = 242,869.11
  5. Step 5: Solve for x
    x = 242,869.11/456.71
  6. Step 6: Final answer
    x = 531.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.