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Finding the Fourth Proportional to 657.93, 987.19 and 349.71

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Solution

The fourth proportional to 657.93, 987.19 and 349.71 is: 524.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.93 : 987.19 = 349.71 : x
  2. Step 2: Convert to fraction form
    657.93/987.19 = 349.71/x
  3. Step 3: Cross multiply
    657.93x = 987.19 × 349.71
  4. Step 4: Simplify right side
    657.93x = 345,230.21
  5. Step 5: Solve for x
    x = 345,230.21/657.93
  6. Step 6: Final answer
    x = 524.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.