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Finding the Fourth Proportional to 538.70, 742.66 and 413.87

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Solution

The fourth proportional to 538.70, 742.66 and 413.87 is: 570.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.70 : 742.66 = 413.87 : x
  2. Step 2: Convert to fraction form
    538.70/742.66 = 413.87/x
  3. Step 3: Cross multiply
    538.70x = 742.66 × 413.87
  4. Step 4: Simplify right side
    538.70x = 307,359.95
  5. Step 5: Solve for x
    x = 307,359.95/538.70
  6. Step 6: Final answer
    x = 570.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.