Home / 1,126.18-1,553.92-628.80

Finding the Fourth Proportional to 1,126.18, 1,553.92 and 628.80

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Solution

The fourth proportional to 1,126.18, 1,553.92 and 628.80 is: 867.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.18 : 1,553.92 = 628.80 : x
  2. Step 2: Convert to fraction form
    1,126.18/1,553.92 = 628.80/x
  3. Step 3: Cross multiply
    1,126.18x = 1,553.92 × 628.80
  4. Step 4: Simplify right side
    1,126.18x = 977,104.90
  5. Step 5: Solve for x
    x = 977,104.90/1,126.18
  6. Step 6: Final answer
    x = 867.63

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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.