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Finding the Fourth Proportional to 614.17, 847.66 and 393.11

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Solution

The fourth proportional to 614.17, 847.66 and 393.11 is: 542.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.17 : 847.66 = 393.11 : x
  2. Step 2: Convert to fraction form
    614.17/847.66 = 393.11/x
  3. Step 3: Cross multiply
    614.17x = 847.66 × 393.11
  4. Step 4: Simplify right side
    614.17x = 333,223.62
  5. Step 5: Solve for x
    x = 333,223.62/614.17
  6. Step 6: Final answer
    x = 542.56

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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.