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Finding the Fourth Proportional to 3,682.80, 5,518.80 and 1,487.70

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Solution

The fourth proportional to 3,682.80, 5,518.80 and 1,487.70 is: 2,229.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,682.80 : 5,518.80 = 1,487.70 : x
  2. Step 2: Convert to fraction form
    3,682.80/5,518.80 = 1,487.70/x
  3. Step 3: Cross multiply
    3,682.80x = 5,518.80 × 1,487.70
  4. Step 4: Simplify right side
    3,682.80x = 8,210,318.76
  5. Step 5: Solve for x
    x = 8,210,318.76/3,682.80
  6. Step 6: Final answer
    x = 2,229.37

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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.