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Finding the Fourth Proportional to 916.72, 1,264.92 and 523.77

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Solution

The fourth proportional to 916.72, 1,264.92 and 523.77 is: 722.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.72 : 1,264.92 = 523.77 : x
  2. Step 2: Convert to fraction form
    916.72/1,264.92 = 523.77/x
  3. Step 3: Cross multiply
    916.72x = 1,264.92 × 523.77
  4. Step 4: Simplify right side
    916.72x = 662,520.44
  5. Step 5: Solve for x
    x = 662,520.44/916.72
  6. Step 6: Final answer
    x = 722.71

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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.