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Finding the Fourth Proportional to 1,781.19, 2,671.75 and 548.61

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Solution

The fourth proportional to 1,781.19, 2,671.75 and 548.61 is: 822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.19 : 2,671.75 = 548.61 : x
  2. Step 2: Convert to fraction form
    1,781.19/2,671.75 = 548.61/x
  3. Step 3: Cross multiply
    1,781.19x = 2,671.75 × 548.61
  4. Step 4: Simplify right side
    1,781.19x = 1,465,739.43
  5. Step 5: Solve for x
    x = 1,465,739.43/1,781.19
  6. Step 6: Final answer
    x = 822.90

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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.