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Finding the Fourth Proportional to 3,679.70, 5,519.55 and 1,487.30

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Solution

The fourth proportional to 3,679.70, 5,519.55 and 1,487.30 is: 2,230.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.70 : 5,519.55 = 1,487.30 : x
  2. Step 2: Convert to fraction form
    3,679.70/5,519.55 = 1,487.30/x
  3. Step 3: Cross multiply
    3,679.70x = 5,519.55 × 1,487.30
  4. Step 4: Simplify right side
    3,679.70x = 8,209,226.72
  5. Step 5: Solve for x
    x = 8,209,226.72/3,679.70
  6. Step 6: Final answer
    x = 2,230.95

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1.5x scale

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.