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Finding the Fourth Proportional to 439.43, 607.10 and 394.88

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Solution

The fourth proportional to 439.43, 607.10 and 394.88 is: 545.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.43 : 607.10 = 394.88 : x
  2. Step 2: Convert to fraction form
    439.43/607.10 = 394.88/x
  3. Step 3: Cross multiply
    439.43x = 607.10 × 394.88
  4. Step 4: Simplify right side
    439.43x = 239,726.64
  5. Step 5: Solve for x
    x = 239,726.64/439.43
  6. Step 6: Final answer
    x = 545.55

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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.