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Finding the Fourth Proportional to 3,679.84, 5,520.70 and 1,082.78

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Solution

The fourth proportional to 3,679.84, 5,520.70 and 1,082.78 is: 1,624.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.84 : 5,520.70 = 1,082.78 : x
  2. Step 2: Convert to fraction form
    3,679.84/5,520.70 = 1,082.78/x
  3. Step 3: Cross multiply
    3,679.84x = 5,520.70 × 1,082.78
  4. Step 4: Simplify right side
    3,679.84x = 5,977,703.55
  5. Step 5: Solve for x
    x = 5,977,703.55/3,679.84
  6. Step 6: Final answer
    x = 1,624.45

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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.