Home / 3,171.42-4,376.50-1,755.20

Finding the Fourth Proportional to 3,171.42, 4,376.50 and 1,755.20

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Solution

The fourth proportional to 3,171.42, 4,376.50 and 1,755.20 is: 2,422.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,171.42 : 4,376.50 = 1,755.20 : x
  2. Step 2: Convert to fraction form
    3,171.42/4,376.50 = 1,755.20/x
  3. Step 3: Cross multiply
    3,171.42x = 4,376.50 × 1,755.20
  4. Step 4: Simplify right side
    3,171.42x = 7,681,639.35
  5. Step 5: Solve for x
    x = 7,681,639.35/3,171.42
  6. Step 6: Final answer
    x = 2,422.15

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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.