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Finding the Fourth Proportional to 3,039.88, 4,559.81 and 987.88

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Solution

The fourth proportional to 3,039.88, 4,559.81 and 987.88 is: 1,481.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,039.88 : 4,559.81 = 987.88 : x
  2. Step 2: Convert to fraction form
    3,039.88/4,559.81 = 987.88/x
  3. Step 3: Cross multiply
    3,039.88x = 4,559.81 × 987.88
  4. Step 4: Simplify right side
    3,039.88x = 4,504,545.10
  5. Step 5: Solve for x
    x = 4,504,545.10/3,039.88
  6. Step 6: Final answer
    x = 1,481.82

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Similar ratio
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1.5x scale

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.