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Finding the Fourth Proportional to 657.86, 987.22 and 292.51

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Solution

The fourth proportional to 657.86, 987.22 and 292.51 is: 438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.86 : 987.22 = 292.51 : x
  2. Step 2: Convert to fraction form
    657.86/987.22 = 292.51/x
  3. Step 3: Cross multiply
    657.86x = 987.22 × 292.51
  4. Step 4: Simplify right side
    657.86x = 288,773.32
  5. Step 5: Solve for x
    x = 288,773.32/657.86
  6. Step 6: Final answer
    x = 438.96

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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.