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Finding the Fourth Proportional to 3,171.68, 4,377.12 and 1,774.88

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Solution

The fourth proportional to 3,171.68, 4,377.12 and 1,774.88 is: 2,449.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.68 : 4,377.12 = 1,774.88 : x
  2. Step 2: Convert to fraction form
    3,171.68/4,377.12 = 1,774.88/x
  3. Step 3: Cross multiply
    3,171.68x = 4,377.12 × 1,774.88
  4. Step 4: Simplify right side
    3,171.68x = 7,768,862.75
  5. Step 5: Solve for x
    x = 7,768,862.75/3,171.68
  6. Step 6: Final answer
    x = 2,449.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.