Home / 1,982.90-2,737.58-1,385.12

Finding the Fourth Proportional to 1,982.90, 2,737.58 and 1,385.12

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Solution

The fourth proportional to 1,982.90, 2,737.58 and 1,385.12 is: 1,912.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.90 : 2,737.58 = 1,385.12 : x
  2. Step 2: Convert to fraction form
    1,982.90/2,737.58 = 1,385.12/x
  3. Step 3: Cross multiply
    1,982.90x = 2,737.58 × 1,385.12
  4. Step 4: Simplify right side
    1,982.90x = 3,791,876.73
  5. Step 5: Solve for x
    x = 3,791,876.73/1,982.90
  6. Step 6: Final answer
    x = 1,912.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.