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Finding the Fourth Proportional to 3,182.46, 4,774.49 and 991.20

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Solution

The fourth proportional to 3,182.46, 4,774.49 and 991.20 is: 1,487.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,182.46 : 4,774.49 = 991.20 : x
  2. Step 2: Convert to fraction form
    3,182.46/4,774.49 = 991.20/x
  3. Step 3: Cross multiply
    3,182.46x = 4,774.49 × 991.20
  4. Step 4: Simplify right side
    3,182.46x = 4,732,469.53
  5. Step 5: Solve for x
    x = 4,732,469.53/3,182.46
  6. Step 6: Final answer
    x = 1,487.05

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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.