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Finding the Fourth Proportional to 372.20, 558.10 and 275.81

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Solution

The fourth proportional to 372.20, 558.10 and 275.81 is: 413.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.20 : 558.10 = 275.81 : x
  2. Step 2: Convert to fraction form
    372.20/558.10 = 275.81/x
  3. Step 3: Cross multiply
    372.20x = 558.10 × 275.81
  4. Step 4: Simplify right side
    372.20x = 153,930.27
  5. Step 5: Solve for x
    x = 153,930.27/372.20
  6. Step 6: Final answer
    x = 413.57

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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.