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Finding the Fourth Proportional to 3,171.87, 4,758.36 and 980.55

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Solution

The fourth proportional to 3,171.87, 4,758.36 and 980.55 is: 1,471.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.87 : 4,758.36 = 980.55 : x
  2. Step 2: Convert to fraction form
    3,171.87/4,758.36 = 980.55/x
  3. Step 3: Cross multiply
    3,171.87x = 4,758.36 × 980.55
  4. Step 4: Simplify right side
    3,171.87x = 4,665,809.90
  5. Step 5: Solve for x
    x = 4,665,809.90/3,171.87
  6. Step 6: Final answer
    x = 1,471.00

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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.