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Finding the Fourth Proportional to 3,172.53, 4,759.31 and 980.74

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Solution

The fourth proportional to 3,172.53, 4,759.31 and 980.74 is: 1,471.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.53 : 4,759.31 = 980.74 : x
  2. Step 2: Convert to fraction form
    3,172.53/4,759.31 = 980.74/x
  3. Step 3: Cross multiply
    3,172.53x = 4,759.31 × 980.74
  4. Step 4: Simplify right side
    3,172.53x = 4,667,645.69
  5. Step 5: Solve for x
    x = 4,667,645.69/3,172.53
  6. Step 6: Final answer
    x = 1,471.27

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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.