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Finding the Fourth Proportional to 347.24, 520.18 and 269.78

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Solution

The fourth proportional to 347.24, 520.18 and 269.78 is: 404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.24 : 520.18 = 269.78 : x
  2. Step 2: Convert to fraction form
    347.24/520.18 = 269.78/x
  3. Step 3: Cross multiply
    347.24x = 520.18 × 269.78
  4. Step 4: Simplify right side
    347.24x = 140,334.79
  5. Step 5: Solve for x
    x = 140,334.79/347.24
  6. Step 6: Final answer
    x = 404.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.