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Finding the Fourth Proportional to 439.52, 605.51 and 306.50

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Solution

The fourth proportional to 439.52, 605.51 and 306.50 is: 422.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.52 : 605.51 = 306.50 : x
  2. Step 2: Convert to fraction form
    439.52/605.51 = 306.50/x
  3. Step 3: Cross multiply
    439.52x = 605.51 × 306.50
  4. Step 4: Simplify right side
    439.52x = 185,587.10
  5. Step 5: Solve for x
    x = 185,587.10/439.52
  6. Step 6: Final answer
    x = 422.25

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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.