Home / 1,282.24-1,921.98-915.92

Finding the Fourth Proportional to 1,282.24, 1,921.98 and 915.92

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Solution

The fourth proportional to 1,282.24, 1,921.98 and 915.92 is: 1,372.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.24 : 1,921.98 = 915.92 : x
  2. Step 2: Convert to fraction form
    1,282.24/1,921.98 = 915.92/x
  3. Step 3: Cross multiply
    1,282.24x = 1,921.98 × 915.92
  4. Step 4: Simplify right side
    1,282.24x = 1,760,380.95
  5. Step 5: Solve for x
    x = 1,760,380.95/1,282.24
  6. Step 6: Final answer
    x = 1,372.89

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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.