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Finding the Fourth Proportional to 362.35, 543.57 and 145.90

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Solution

The fourth proportional to 362.35, 543.57 and 145.90 is: 218.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.35 : 543.57 = 145.90 : x
  2. Step 2: Convert to fraction form
    362.35/543.57 = 145.90/x
  3. Step 3: Cross multiply
    362.35x = 543.57 × 145.90
  4. Step 4: Simplify right side
    362.35x = 79,306.86
  5. Step 5: Solve for x
    x = 79,306.86/362.35
  6. Step 6: Final answer
    x = 218.87

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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.