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Finding the Fourth Proportional to 905.65, 1,249.27 and 532.55

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Solution

The fourth proportional to 905.65, 1,249.27 and 532.55 is: 734.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.65 : 1,249.27 = 532.55 : x
  2. Step 2: Convert to fraction form
    905.65/1,249.27 = 532.55/x
  3. Step 3: Cross multiply
    905.65x = 1,249.27 × 532.55
  4. Step 4: Simplify right side
    905.65x = 665,298.74
  5. Step 5: Solve for x
    x = 665,298.74/905.65
  6. Step 6: Final answer
    x = 734.61

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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.