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Finding the Fourth Proportional to 916.68, 1,265.04 and 502.68

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Solution

The fourth proportional to 916.68, 1,265.04 and 502.68 is: 693.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    916.68 : 1,265.04 = 502.68 : x
  2. Step 2: Convert to fraction form
    916.68/1,265.04 = 502.68/x
  3. Step 3: Cross multiply
    916.68x = 1,265.04 × 502.68
  4. Step 4: Simplify right side
    916.68x = 635,910.31
  5. Step 5: Solve for x
    x = 635,910.31/916.68
  6. Step 6: Final answer
    x = 693.71

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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.