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Finding the Fourth Proportional to 456.32, 685.56 and 432.56

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Solution

The fourth proportional to 456.32, 685.56 and 432.56 is: 649.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.32 : 685.56 = 432.56 : x
  2. Step 2: Convert to fraction form
    456.32/685.56 = 432.56/x
  3. Step 3: Cross multiply
    456.32x = 685.56 × 432.56
  4. Step 4: Simplify right side
    456.32x = 296,545.83
  5. Step 5: Solve for x
    x = 296,545.83/456.32
  6. Step 6: Final answer
    x = 649.86

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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.