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Finding the Fourth Proportional to 3,172.67, 4,759.13 and 981.44

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Solution

The fourth proportional to 3,172.67, 4,759.13 and 981.44 is: 1,472.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.67 : 4,759.13 = 981.44 : x
  2. Step 2: Convert to fraction form
    3,172.67/4,759.13 = 981.44/x
  3. Step 3: Cross multiply
    3,172.67x = 4,759.13 × 981.44
  4. Step 4: Simplify right side
    3,172.67x = 4,670,776.75
  5. Step 5: Solve for x
    x = 4,670,776.75/3,172.67
  6. Step 6: Final answer
    x = 1,472.19

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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.