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Finding the Fourth Proportional to 362.12, 543.15 and 145.55

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Solution

The fourth proportional to 362.12, 543.15 and 145.55 is: 218.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.12 : 543.15 = 145.55 : x
  2. Step 2: Convert to fraction form
    362.12/543.15 = 145.55/x
  3. Step 3: Cross multiply
    362.12x = 543.15 × 145.55
  4. Step 4: Simplify right side
    362.12x = 79,052.77
  5. Step 5: Solve for x
    x = 79,052.77/362.12
  6. Step 6: Final answer
    x = 218.31

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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.