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Finding the Fourth Proportional to 442.18, 663.30 and 149.59

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Solution

The fourth proportional to 442.18, 663.30 and 149.59 is: 224.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.18 : 663.30 = 149.59 : x
  2. Step 2: Convert to fraction form
    442.18/663.30 = 149.59/x
  3. Step 3: Cross multiply
    442.18x = 663.30 × 149.59
  4. Step 4: Simplify right side
    442.18x = 99,223.05
  5. Step 5: Solve for x
    x = 99,223.05/442.18
  6. Step 6: Final answer
    x = 224.40

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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.