Home / 1,126.12-1,554.05-628.86

Finding the Fourth Proportional to 1,126.12, 1,554.05 and 628.86

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Solution

The fourth proportional to 1,126.12, 1,554.05 and 628.86 is: 867.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.12 : 1,554.05 = 628.86 : x
  2. Step 2: Convert to fraction form
    1,126.12/1,554.05 = 628.86/x
  3. Step 3: Cross multiply
    1,126.12x = 1,554.05 × 628.86
  4. Step 4: Simplify right side
    1,126.12x = 977,268.97
  5. Step 5: Solve for x
    x = 977,268.97/1,126.12
  6. Step 6: Final answer
    x = 867.82

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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.