Home / 1,726.12-2,382.18-980.20

Finding the Fourth Proportional to 1,726.12, 2,382.18 and 980.20

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Solution

The fourth proportional to 1,726.12, 2,382.18 and 980.20 is: 1,352.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.12 : 2,382.18 = 980.20 : x
  2. Step 2: Convert to fraction form
    1,726.12/2,382.18 = 980.20/x
  3. Step 3: Cross multiply
    1,726.12x = 2,382.18 × 980.20
  4. Step 4: Simplify right side
    1,726.12x = 2,335,012.84
  5. Step 5: Solve for x
    x = 2,335,012.84/1,726.12
  6. Step 6: Final answer
    x = 1,352.75

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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.