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Finding the Fourth Proportional to 657.66, 987 and 292.76

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Solution

The fourth proportional to 657.66, 987 and 292.76 is: 439.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.66 : 987 = 292.76 : x
  2. Step 2: Convert to fraction form
    657.66/987 = 292.76/x
  3. Step 3: Cross multiply
    657.66x = 987 × 292.76
  4. Step 4: Simplify right side
    657.66x = 288,954.12
  5. Step 5: Solve for x
    x = 288,954.12/657.66
  6. Step 6: Final answer
    x = 439.37

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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.