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Finding the Fourth Proportional to 1,781.42, 2,458.41 and 995.45

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Solution

The fourth proportional to 1,781.42, 2,458.41 and 995.45 is: 1,373.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.42 : 2,458.41 = 995.45 : x
  2. Step 2: Convert to fraction form
    1,781.42/2,458.41 = 995.45/x
  3. Step 3: Cross multiply
    1,781.42x = 2,458.41 × 995.45
  4. Step 4: Simplify right side
    1,781.42x = 2,447,224.23
  5. Step 5: Solve for x
    x = 2,447,224.23/1,781.42
  6. Step 6: Final answer
    x = 1,373.75

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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.