Home / 1,372.80-1,881.60-1,363.20

Finding the Fourth Proportional to 1,372.80, 1,881.60 and 1,363.20

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Solution

The fourth proportional to 1,372.80, 1,881.60 and 1,363.20 is: 1,868.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.80 : 1,881.60 = 1,363.20 : x
  2. Step 2: Convert to fraction form
    1,372.80/1,881.60 = 1,363.20/x
  3. Step 3: Cross multiply
    1,372.80x = 1,881.60 × 1,363.20
  4. Step 4: Simplify right side
    1,372.80x = 2,564,997.12
  5. Step 5: Solve for x
    x = 2,564,997.12/1,372.80
  6. Step 6: Final answer
    x = 1,868.44

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.