Home / 1,921.22-2,882.04-688.46

Finding the Fourth Proportional to 1,921.22, 2,882.04 and 688.46

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Solution

The fourth proportional to 1,921.22, 2,882.04 and 688.46 is: 1,032.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.22 : 2,882.04 = 688.46 : x
  2. Step 2: Convert to fraction form
    1,921.22/2,882.04 = 688.46/x
  3. Step 3: Cross multiply
    1,921.22x = 2,882.04 × 688.46
  4. Step 4: Simplify right side
    1,921.22x = 1,984,169.26
  5. Step 5: Solve for x
    x = 1,984,169.26/1,921.22
  6. Step 6: Final answer
    x = 1,032.77

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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.