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Finding the Fourth Proportional to 916.91, 1,265.56 and 524.16

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Solution

The fourth proportional to 916.91, 1,265.56 and 524.16 is: 723.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.91 : 1,265.56 = 524.16 : x
  2. Step 2: Convert to fraction form
    916.91/1,265.56 = 524.16/x
  3. Step 3: Cross multiply
    916.91x = 1,265.56 × 524.16
  4. Step 4: Simplify right side
    916.91x = 663,353.31
  5. Step 5: Solve for x
    x = 663,353.31/916.91
  6. Step 6: Final answer
    x = 723.47

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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.