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Finding the Fourth Proportional to 500.73, 691.01 and 279.69

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Solution

The fourth proportional to 500.73, 691.01 and 279.69 is: 385.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.73 : 691.01 = 279.69 : x
  2. Step 2: Convert to fraction form
    500.73/691.01 = 279.69/x
  3. Step 3: Cross multiply
    500.73x = 691.01 × 279.69
  4. Step 4: Simplify right side
    500.73x = 193,268.24
  5. Step 5: Solve for x
    x = 193,268.24/500.73
  6. Step 6: Final answer
    x = 385.98

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Double scale
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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.