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Finding the Fourth Proportional to 691.43, 953.25 and 494.60

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Solution

The fourth proportional to 691.43, 953.25 and 494.60 is: 681.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    691.43 : 953.25 = 494.60 : x
  2. Step 2: Convert to fraction form
    691.43/953.25 = 494.60/x
  3. Step 3: Cross multiply
    691.43x = 953.25 × 494.60
  4. Step 4: Simplify right side
    691.43x = 471,477.45
  5. Step 5: Solve for x
    x = 471,477.45/691.43
  6. Step 6: Final answer
    x = 681.89

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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.