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Finding the Fourth Proportional to 905.51, 1,249.59 and 532.43

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Solution

The fourth proportional to 905.51, 1,249.59 and 532.43 is: 734.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.51 : 1,249.59 = 532.43 : x
  2. Step 2: Convert to fraction form
    905.51/1,249.59 = 532.43/x
  3. Step 3: Cross multiply
    905.51x = 1,249.59 × 532.43
  4. Step 4: Simplify right side
    905.51x = 665,312.96
  5. Step 5: Solve for x
    x = 665,312.96/905.51
  6. Step 6: Final answer
    x = 734.74

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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.