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Finding the Fourth Proportional to 614.15, 847.25 and 393.02

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Solution

The fourth proportional to 614.15, 847.25 and 393.02 is: 542.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.15 : 847.25 = 393.02 : x
  2. Step 2: Convert to fraction form
    614.15/847.25 = 393.02/x
  3. Step 3: Cross multiply
    614.15x = 847.25 × 393.02
  4. Step 4: Simplify right side
    614.15x = 332,979.99
  5. Step 5: Solve for x
    x = 332,979.99/614.15
  6. Step 6: Final answer
    x = 542.18

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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.