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Finding the Fourth Proportional to 708.62, 977.87 and 413.92

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Solution

The fourth proportional to 708.62, 977.87 and 413.92 is: 571.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.62 : 977.87 = 413.92 : x
  2. Step 2: Convert to fraction form
    708.62/977.87 = 413.92/x
  3. Step 3: Cross multiply
    708.62x = 977.87 × 413.92
  4. Step 4: Simplify right side
    708.62x = 404,752.99
  5. Step 5: Solve for x
    x = 404,752.99/708.62
  6. Step 6: Final answer
    x = 571.18

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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.