Home / 3,172.57-4,378.11-1,775.32

Finding the Fourth Proportional to 3,172.57, 4,378.11 and 1,775.32

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Solution

The fourth proportional to 3,172.57, 4,378.11 and 1,775.32 is: 2,449.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.57 : 4,378.11 = 1,775.32 : x
  2. Step 2: Convert to fraction form
    3,172.57/4,378.11 = 1,775.32/x
  3. Step 3: Cross multiply
    3,172.57x = 4,378.11 × 1,775.32
  4. Step 4: Simplify right side
    3,172.57x = 7,772,546.25
  5. Step 5: Solve for x
    x = 7,772,546.25/3,172.57
  6. Step 6: Final answer
    x = 2,449.92

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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.