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Finding the Fourth Proportional to 691.10, 954.16 and 495.26

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Solution

The fourth proportional to 691.10, 954.16 and 495.26 is: 683.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.10 : 954.16 = 495.26 : x
  2. Step 2: Convert to fraction form
    691.10/954.16 = 495.26/x
  3. Step 3: Cross multiply
    691.10x = 954.16 × 495.26
  4. Step 4: Simplify right side
    691.10x = 472,557.28
  5. Step 5: Solve for x
    x = 472,557.28/691.10
  6. Step 6: Final answer
    x = 683.78

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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.