Home / 1,128.66-1,546.28-1,086.60

Finding the Fourth Proportional to 1,128.66, 1,546.28 and 1,086.60

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Solution

The fourth proportional to 1,128.66, 1,546.28 and 1,086.60 is: 1,488.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,128.66 : 1,546.28 = 1,086.60 : x
  2. Step 2: Convert to fraction form
    1,128.66/1,546.28 = 1,086.60/x
  3. Step 3: Cross multiply
    1,128.66x = 1,546.28 × 1,086.60
  4. Step 4: Simplify right side
    1,128.66x = 1,680,187.85
  5. Step 5: Solve for x
    x = 1,680,187.85/1,128.66
  6. Step 6: Final answer
    x = 1,488.66

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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.