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Finding the Fourth Proportional to 916.85, 1,265.23 and 523.86

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Solution

The fourth proportional to 916.85, 1,265.23 and 523.86 is: 722.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.85 : 1,265.23 = 523.86 : x
  2. Step 2: Convert to fraction form
    916.85/1,265.23 = 523.86/x
  3. Step 3: Cross multiply
    916.85x = 1,265.23 × 523.86
  4. Step 4: Simplify right side
    916.85x = 662,803.39
  5. Step 5: Solve for x
    x = 662,803.39/916.85
  6. Step 6: Final answer
    x = 722.91

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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.