Home / 1,108.31-1,529.46-660.49

Finding the Fourth Proportional to 1,108.31, 1,529.46 and 660.49

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Solution

The fourth proportional to 1,108.31, 1,529.46 and 660.49 is: 911.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.31 : 1,529.46 = 660.49 : x
  2. Step 2: Convert to fraction form
    1,108.31/1,529.46 = 660.49/x
  3. Step 3: Cross multiply
    1,108.31x = 1,529.46 × 660.49
  4. Step 4: Simplify right side
    1,108.31x = 1,010,194.95
  5. Step 5: Solve for x
    x = 1,010,194.95/1,108.31
  6. Step 6: Final answer
    x = 911.47

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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.