Home / 2,938.80-4,055.25-1,680.18

Finding the Fourth Proportional to 2,938.80, 4,055.25 and 1,680.18

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Solution

The fourth proportional to 2,938.80, 4,055.25 and 1,680.18 is: 2,318.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.80 : 4,055.25 = 1,680.18 : x
  2. Step 2: Convert to fraction form
    2,938.80/4,055.25 = 1,680.18/x
  3. Step 3: Cross multiply
    2,938.80x = 4,055.25 × 1,680.18
  4. Step 4: Simplify right side
    2,938.80x = 6,813,549.95
  5. Step 5: Solve for x
    x = 6,813,549.95/2,938.80
  6. Step 6: Final answer
    x = 2,318.48

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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.