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Finding the Fourth Proportional to 439.61, 660.24 and 403.49

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Solution

The fourth proportional to 439.61, 660.24 and 403.49 is: 605.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.61 : 660.24 = 403.49 : x
  2. Step 2: Convert to fraction form
    439.61/660.24 = 403.49/x
  3. Step 3: Cross multiply
    439.61x = 660.24 × 403.49
  4. Step 4: Simplify right side
    439.61x = 266,400.24
  5. Step 5: Solve for x
    x = 266,400.24/439.61
  6. Step 6: Final answer
    x = 605.99

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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.