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Finding the Fourth Proportional to 362.10, 543.02 and 145.61

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Solution

The fourth proportional to 362.10, 543.02 and 145.61 is: 218.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.10 : 543.02 = 145.61 : x
  2. Step 2: Convert to fraction form
    362.10/543.02 = 145.61/x
  3. Step 3: Cross multiply
    362.10x = 543.02 × 145.61
  4. Step 4: Simplify right side
    362.10x = 79,065.70
  5. Step 5: Solve for x
    x = 79,065.70/362.10
  6. Step 6: Final answer
    x = 218.35

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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.