Home / 3,587.50-5,381.61-1,279.90

Finding the Fourth Proportional to 3,587.50, 5,381.61 and 1,279.90

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Solution

The fourth proportional to 3,587.50, 5,381.61 and 1,279.90 is: 1,919.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,587.50 : 5,381.61 = 1,279.90 : x
  2. Step 2: Convert to fraction form
    3,587.50/5,381.61 = 1,279.90/x
  3. Step 3: Cross multiply
    3,587.50x = 5,381.61 × 1,279.90
  4. Step 4: Simplify right side
    3,587.50x = 6,887,922.64
  5. Step 5: Solve for x
    x = 6,887,922.64/3,587.50
  6. Step 6: Final answer
    x = 1,919.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.