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Finding the Fourth Proportional to 679.38, 937.71 and 413.91

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Solution

The fourth proportional to 679.38, 937.71 and 413.91 is: 571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.38 : 937.71 = 413.91 : x
  2. Step 2: Convert to fraction form
    679.38/937.71 = 413.91/x
  3. Step 3: Cross multiply
    679.38x = 937.71 × 413.91
  4. Step 4: Simplify right side
    679.38x = 388,127.55
  5. Step 5: Solve for x
    x = 388,127.55/679.38
  6. Step 6: Final answer
    x = 571.30

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1.5x scale

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.