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Finding the Fourth Proportional to 292.32, 402.84 and 284.76

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Solution

The fourth proportional to 292.32, 402.84 and 284.76 is: 392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    292.32 : 402.84 = 284.76 : x
  2. Step 2: Convert to fraction form
    292.32/402.84 = 284.76/x
  3. Step 3: Cross multiply
    292.32x = 402.84 × 284.76
  4. Step 4: Simplify right side
    292.32x = 114,712.72
  5. Step 5: Solve for x
    x = 114,712.72/292.32
  6. Step 6: Final answer
    x = 392.42

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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.