Home / 1,911.25-2,637.12-1,281.88

Finding the Fourth Proportional to 1,911.25, 2,637.12 and 1,281.88

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Solution

The fourth proportional to 1,911.25, 2,637.12 and 1,281.88 is: 1,768.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.25 : 2,637.12 = 1,281.88 : x
  2. Step 2: Convert to fraction form
    1,911.25/2,637.12 = 1,281.88/x
  3. Step 3: Cross multiply
    1,911.25x = 2,637.12 × 1,281.88
  4. Step 4: Simplify right side
    1,911.25x = 3,380,471.39
  5. Step 5: Solve for x
    x = 3,380,471.39/1,911.25
  6. Step 6: Final answer
    x = 1,768.72

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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.