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Finding the Fourth Proportional to 1,760.97, 2,641.39 and 720.70

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Solution

The fourth proportional to 1,760.97, 2,641.39 and 720.70 is: 1,081.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,760.97 : 2,641.39 = 720.70 : x
  2. Step 2: Convert to fraction form
    1,760.97/2,641.39 = 720.70/x
  3. Step 3: Cross multiply
    1,760.97x = 2,641.39 × 720.70
  4. Step 4: Simplify right side
    1,760.97x = 1,903,645.42
  5. Step 5: Solve for x
    x = 1,903,645.42/1,760.97
  6. Step 6: Final answer
    x = 1,081.02

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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.