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Finding the Fourth Proportional to 439.40, 657.88 and 222.52

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Solution

The fourth proportional to 439.40, 657.88 and 222.52 is: 333.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.40 : 657.88 = 222.52 : x
  2. Step 2: Convert to fraction form
    439.40/657.88 = 222.52/x
  3. Step 3: Cross multiply
    439.40x = 657.88 × 222.52
  4. Step 4: Simplify right side
    439.40x = 146,391.46
  5. Step 5: Solve for x
    x = 146,391.46/439.40
  6. Step 6: Final answer
    x = 333.16

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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.