Home / 1,126.16-1,554.40-660.72

Finding the Fourth Proportional to 1,126.16, 1,554.40 and 660.72

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Solution

The fourth proportional to 1,126.16, 1,554.40 and 660.72 is: 911.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.16 : 1,554.40 = 660.72 : x
  2. Step 2: Convert to fraction form
    1,126.16/1,554.40 = 660.72/x
  3. Step 3: Cross multiply
    1,126.16x = 1,554.40 × 660.72
  4. Step 4: Simplify right side
    1,126.16x = 1,027,023.17
  5. Step 5: Solve for x
    x = 1,027,023.17/1,126.16
  6. Step 6: Final answer
    x = 911.97

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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.