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Finding the Fourth Proportional to 1,726.68, 2,382.97 and 980.87

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Solution

The fourth proportional to 1,726.68, 2,382.97 and 980.87 is: 1,353.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,726.68 : 2,382.97 = 980.87 : x
  2. Step 2: Convert to fraction form
    1,726.68/2,382.97 = 980.87/x
  3. Step 3: Cross multiply
    1,726.68x = 2,382.97 × 980.87
  4. Step 4: Simplify right side
    1,726.68x = 2,337,383.78
  5. Step 5: Solve for x
    x = 2,337,383.78/1,726.68
  6. Step 6: Final answer
    x = 1,353.69

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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.