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Finding the Fourth Proportional to 905.61, 1,249.72 and 532.51

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Solution

The fourth proportional to 905.61, 1,249.72 and 532.51 is: 734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.61 : 1,249.72 = 532.51 : x
  2. Step 2: Convert to fraction form
    905.61/1,249.72 = 532.51/x
  3. Step 3: Cross multiply
    905.61x = 1,249.72 × 532.51
  4. Step 4: Simplify right side
    905.61x = 665,486.94
  5. Step 5: Solve for x
    x = 665,486.94/905.61
  6. Step 6: Final answer
    x = 734.85

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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.