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Finding the Fourth Proportional to 347.68, 478.92 and 292.42

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Solution

The fourth proportional to 347.68, 478.92 and 292.42 is: 402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.68 : 478.92 = 292.42 : x
  2. Step 2: Convert to fraction form
    347.68/478.92 = 292.42/x
  3. Step 3: Cross multiply
    347.68x = 478.92 × 292.42
  4. Step 4: Simplify right side
    347.68x = 140,045.79
  5. Step 5: Solve for x
    x = 140,045.79/347.68
  6. Step 6: Final answer
    x = 402.80

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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.