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Finding the Fourth Proportional to 5,685.88, 8,488.19 and 5,279.80

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Solution

The fourth proportional to 5,685.88, 8,488.19 and 5,279.80 is: 7,881.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,685.88 : 8,488.19 = 5,279.80 : x
  2. Step 2: Convert to fraction form
    5,685.88/8,488.19 = 5,279.80/x
  3. Step 3: Cross multiply
    5,685.88x = 8,488.19 × 5,279.80
  4. Step 4: Simplify right side
    5,685.88x = 44,815,945.56
  5. Step 5: Solve for x
    x = 44,815,945.56/5,685.88
  6. Step 6: Final answer
    x = 7,881.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.