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Finding the Fourth Proportional to 916.91, 1,265.34 and 523.93

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Solution

The fourth proportional to 916.91, 1,265.34 and 523.93 is: 723.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.91 : 1,265.34 = 523.93 : x
  2. Step 2: Convert to fraction form
    916.91/1,265.34 = 523.93/x
  3. Step 3: Cross multiply
    916.91x = 1,265.34 × 523.93
  4. Step 4: Simplify right side
    916.91x = 662,946.97
  5. Step 5: Solve for x
    x = 662,946.97/916.91
  6. Step 6: Final answer
    x = 723.03

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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.