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Finding the Fourth Proportional to 1,808.31, 2,708.12 and 881.61

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Solution

The fourth proportional to 1,808.31, 2,708.12 and 881.61 is: 1,320.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,808.31 : 2,708.12 = 881.61 : x
  2. Step 2: Convert to fraction form
    1,808.31/2,708.12 = 881.61/x
  3. Step 3: Cross multiply
    1,808.31x = 2,708.12 × 881.61
  4. Step 4: Simplify right side
    1,808.31x = 2,387,487.72
  5. Step 5: Solve for x
    x = 2,387,487.72/1,808.31
  6. Step 6: Final answer
    x = 1,320.28

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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.