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Finding the Fourth Proportional to 657.89, 987.08 and 292.42

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Solution

The fourth proportional to 657.89, 987.08 and 292.42 is: 438.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.89 : 987.08 = 292.42 : x
  2. Step 2: Convert to fraction form
    657.89/987.08 = 292.42/x
  3. Step 3: Cross multiply
    657.89x = 987.08 × 292.42
  4. Step 4: Simplify right side
    657.89x = 288,641.93
  5. Step 5: Solve for x
    x = 288,641.93/657.89
  6. Step 6: Final answer
    x = 438.74

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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.