Home / 1,489.50-2,232.09-1,078.74

Finding the Fourth Proportional to 1,489.50, 2,232.09 and 1,078.74

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Solution

The fourth proportional to 1,489.50, 2,232.09 and 1,078.74 is: 1,616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.50 : 2,232.09 = 1,078.74 : x
  2. Step 2: Convert to fraction form
    1,489.50/2,232.09 = 1,078.74/x
  3. Step 3: Cross multiply
    1,489.50x = 2,232.09 × 1,078.74
  4. Step 4: Simplify right side
    1,489.50x = 2,407,844.77
  5. Step 5: Solve for x
    x = 2,407,844.77/1,489.50
  6. Step 6: Final answer
    x = 1,616.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.