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Finding the Fourth Proportional to 362.15, 543.16 and 98.61

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Solution

The fourth proportional to 362.15, 543.16 and 98.61 is: 147.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    362.15 : 543.16 = 98.61 : x
  2. Step 2: Convert to fraction form
    362.15/543.16 = 98.61/x
  3. Step 3: Cross multiply
    362.15x = 543.16 × 98.61
  4. Step 4: Simplify right side
    362.15x = 53,561.01
  5. Step 5: Solve for x
    x = 53,561.01/362.15
  6. Step 6: Final answer
    x = 147.90

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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.