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Finding the Fourth Proportional to 292.20, 402.92 and 285.52

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Solution

The fourth proportional to 292.20, 402.92 and 285.52 is: 393.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.20 : 402.92 = 285.52 : x
  2. Step 2: Convert to fraction form
    292.20/402.92 = 285.52/x
  3. Step 3: Cross multiply
    292.20x = 402.92 × 285.52
  4. Step 4: Simplify right side
    292.20x = 115,041.72
  5. Step 5: Solve for x
    x = 115,041.72/292.20
  6. Step 6: Final answer
    x = 393.71

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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.