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Finding the Fourth Proportional to 625.07, 861.19 and 484.70

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Solution

The fourth proportional to 625.07, 861.19 and 484.70 is: 667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.07 : 861.19 = 484.70 : x
  2. Step 2: Convert to fraction form
    625.07/861.19 = 484.70/x
  3. Step 3: Cross multiply
    625.07x = 861.19 × 484.70
  4. Step 4: Simplify right side
    625.07x = 417,413.28
  5. Step 5: Solve for x
    x = 417,413.28/625.07
  6. Step 6: Final answer
    x = 667.78

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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.