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Finding the Fourth Proportional to 145.76, 217.46 and 141.92

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Solution

The fourth proportional to 145.76, 217.46 and 141.92 is: 211.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.76 : 217.46 = 141.92 : x
  2. Step 2: Convert to fraction form
    145.76/217.46 = 141.92/x
  3. Step 3: Cross multiply
    145.76x = 217.46 × 141.92
  4. Step 4: Simplify right side
    145.76x = 30,861.92
  5. Step 5: Solve for x
    x = 30,861.92/145.76
  6. Step 6: Final answer
    x = 211.73

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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.