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Finding the Fourth Proportional to 438.18, 657.11 and 149.86

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Solution

The fourth proportional to 438.18, 657.11 and 149.86 is: 224.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.18 : 657.11 = 149.86 : x
  2. Step 2: Convert to fraction form
    438.18/657.11 = 149.86/x
  3. Step 3: Cross multiply
    438.18x = 657.11 × 149.86
  4. Step 4: Simplify right side
    438.18x = 98,474.50
  5. Step 5: Solve for x
    x = 98,474.50/438.18
  6. Step 6: Final answer
    x = 224.74

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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.