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Finding the Fourth Proportional to 440.61, 606.78 and 394.26

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Solution

The fourth proportional to 440.61, 606.78 and 394.26 is: 542.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.61 : 606.78 = 394.26 : x
  2. Step 2: Convert to fraction form
    440.61/606.78 = 394.26/x
  3. Step 3: Cross multiply
    440.61x = 606.78 × 394.26
  4. Step 4: Simplify right side
    440.61x = 239,229.08
  5. Step 5: Solve for x
    x = 239,229.08/440.61
  6. Step 6: Final answer
    x = 542.95

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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.