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Finding the Fourth Proportional to 1,871.96, 2,581.84 and 1,208.88

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Solution

The fourth proportional to 1,871.96, 2,581.84 and 1,208.88 is: 1,667.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,871.96 : 2,581.84 = 1,208.88 : x
  2. Step 2: Convert to fraction form
    1,871.96/2,581.84 = 1,208.88/x
  3. Step 3: Cross multiply
    1,871.96x = 2,581.84 × 1,208.88
  4. Step 4: Simplify right side
    1,871.96x = 3,121,134.74
  5. Step 5: Solve for x
    x = 3,121,134.74/1,871.96
  6. Step 6: Final answer
    x = 1,667.31

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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.