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Finding the Fourth Proportional to 292,331.52, 403,081.20 and 215,961.12

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Solution

The fourth proportional to 292,331.52, 403,081.20 and 215,961.12 is: 297,777.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,331.52 : 403,081.20 = 215,961.12 : x
  2. Step 2: Convert to fraction form
    292,331.52/403,081.20 = 215,961.12/x
  3. Step 3: Cross multiply
    292,331.52x = 403,081.20 × 215,961.12
  4. Step 4: Simplify right side
    292,331.52x = 87,049,867,402.94
  5. Step 5: Solve for x
    x = 87,049,867,402.94/292,331.52
  6. Step 6: Final answer
    x = 297,777.90

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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.