Home / 3,690.30-5,531.85-1,380.18

Finding the Fourth Proportional to 3,690.30, 5,531.85 and 1,380.18

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Solution

The fourth proportional to 3,690.30, 5,531.85 and 1,380.18 is: 2,068.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,690.30 : 5,531.85 = 1,380.18 : x
  2. Step 2: Convert to fraction form
    3,690.30/5,531.85 = 1,380.18/x
  3. Step 3: Cross multiply
    3,690.30x = 5,531.85 × 1,380.18
  4. Step 4: Simplify right side
    3,690.30x = 7,634,948.73
  5. Step 5: Solve for x
    x = 7,634,948.73/3,690.30
  6. Step 6: Final answer
    x = 2,068.92

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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.