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Finding the Fourth Proportional to 1,781.57, 2,458.61 and 995.61

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Solution

The fourth proportional to 1,781.57, 2,458.61 and 995.61 is: 1,373.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.57 : 2,458.61 = 995.61 : x
  2. Step 2: Convert to fraction form
    1,781.57/2,458.61 = 995.61/x
  3. Step 3: Cross multiply
    1,781.57x = 2,458.61 × 995.61
  4. Step 4: Simplify right side
    1,781.57x = 2,447,816.70
  5. Step 5: Solve for x
    x = 2,447,816.70/1,781.57
  6. Step 6: Final answer
    x = 1,373.97

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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.