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Finding the Fourth Proportional to 149.96, 223.67 and 145.40

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Solution

The fourth proportional to 149.96, 223.67 and 145.40 is: 216.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    149.96 : 223.67 = 145.40 : x
  2. Step 2: Convert to fraction form
    149.96/223.67 = 145.40/x
  3. Step 3: Cross multiply
    149.96x = 223.67 × 145.40
  4. Step 4: Simplify right side
    149.96x = 32,521.62
  5. Step 5: Solve for x
    x = 32,521.62/149.96
  6. Step 6: Final answer
    x = 216.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.