Home / 1,921.48-2,882.26-688.97

Finding the Fourth Proportional to 1,921.48, 2,882.26 and 688.97

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Solution

The fourth proportional to 1,921.48, 2,882.26 and 688.97 is: 1,033.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.48 : 2,882.26 = 688.97 : x
  2. Step 2: Convert to fraction form
    1,921.48/2,882.26 = 688.97/x
  3. Step 3: Cross multiply
    1,921.48x = 2,882.26 × 688.97
  4. Step 4: Simplify right side
    1,921.48x = 1,985,790.67
  5. Step 5: Solve for x
    x = 1,985,790.67/1,921.48
  6. Step 6: Final answer
    x = 1,033.47

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1.5x scale

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.