Home / 1,126.29-1,554.15-628.90

Finding the Fourth Proportional to 1,126.29, 1,554.15 and 628.90

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Solution

The fourth proportional to 1,126.29, 1,554.15 and 628.90 is: 867.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.29 : 1,554.15 = 628.90 : x
  2. Step 2: Convert to fraction form
    1,126.29/1,554.15 = 628.90/x
  3. Step 3: Cross multiply
    1,126.29x = 1,554.15 × 628.90
  4. Step 4: Simplify right side
    1,126.29x = 977,404.94
  5. Step 5: Solve for x
    x = 977,404.94/1,126.29
  6. Step 6: Final answer
    x = 867.81

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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.