Home / 2,176.40-3,244.78-1,971.20

Finding the Fourth Proportional to 2,176.40, 3,244.78 and 1,971.20

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Solution

The fourth proportional to 2,176.40, 3,244.78 and 1,971.20 is: 2,938.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,176.40 : 3,244.78 = 1,971.20 : x
  2. Step 2: Convert to fraction form
    2,176.40/3,244.78 = 1,971.20/x
  3. Step 3: Cross multiply
    2,176.40x = 3,244.78 × 1,971.20
  4. Step 4: Simplify right side
    2,176.40x = 6,396,110.34
  5. Step 5: Solve for x
    x = 6,396,110.34/2,176.40
  6. Step 6: Final answer
    x = 2,938.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.