Home / 2,169.21-3,248.95-1,680.78

Finding the Fourth Proportional to 2,169.21, 3,248.95 and 1,680.78

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Solution

The fourth proportional to 2,169.21, 3,248.95 and 1,680.78 is: 2,517.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.21 : 3,248.95 = 1,680.78 : x
  2. Step 2: Convert to fraction form
    2,169.21/3,248.95 = 1,680.78/x
  3. Step 3: Cross multiply
    2,169.21x = 3,248.95 × 1,680.78
  4. Step 4: Simplify right side
    2,169.21x = 5,460,770.18
  5. Step 5: Solve for x
    x = 5,460,770.18/2,169.21
  6. Step 6: Final answer
    x = 2,517.40

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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.