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Finding the Fourth Proportional to 1,241.10, 1,712.78 and 798.70

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Solution

The fourth proportional to 1,241.10, 1,712.78 and 798.70 is: 1,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.10 : 1,712.78 = 798.70 : x
  2. Step 2: Convert to fraction form
    1,241.10/1,712.78 = 798.70/x
  3. Step 3: Cross multiply
    1,241.10x = 1,712.78 × 798.70
  4. Step 4: Simplify right side
    1,241.10x = 1,367,997.39
  5. Step 5: Solve for x
    x = 1,367,997.39/1,241.10
  6. Step 6: Final answer
    x = 1,102.25

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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.