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Finding the Fourth Proportional to 1,871.60, 2,810.10 and 1,326.20

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Solution

The fourth proportional to 1,871.60, 2,810.10 and 1,326.20 is: 1,991.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.60 : 2,810.10 = 1,326.20 : x
  2. Step 2: Convert to fraction form
    1,871.60/2,810.10 = 1,326.20/x
  3. Step 3: Cross multiply
    1,871.60x = 2,810.10 × 1,326.20
  4. Step 4: Simplify right side
    1,871.60x = 3,726,754.62
  5. Step 5: Solve for x
    x = 3,726,754.62/1,871.60
  6. Step 6: Final answer
    x = 1,991.21

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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.