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Finding the Fourth Proportional to 347.52, 478.56 and 269.76

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Solution

The fourth proportional to 347.52, 478.56 and 269.76 is: 371.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.52 : 478.56 = 269.76 : x
  2. Step 2: Convert to fraction form
    347.52/478.56 = 269.76/x
  3. Step 3: Cross multiply
    347.52x = 478.56 × 269.76
  4. Step 4: Simplify right side
    347.52x = 129,096.35
  5. Step 5: Solve for x
    x = 129,096.35/347.52
  6. Step 6: Final answer
    x = 371.48

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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.