Home / 1,086.15-1,498.90-660.66

Finding the Fourth Proportional to 1,086.15, 1,498.90 and 660.66

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Solution

The fourth proportional to 1,086.15, 1,498.90 and 660.66 is: 911.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.15 : 1,498.90 = 660.66 : x
  2. Step 2: Convert to fraction form
    1,086.15/1,498.90 = 660.66/x
  3. Step 3: Cross multiply
    1,086.15x = 1,498.90 × 660.66
  4. Step 4: Simplify right side
    1,086.15x = 990,263.27
  5. Step 5: Solve for x
    x = 990,263.27/1,086.15
  6. Step 6: Final answer
    x = 911.72

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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.