Home / 1,285.89-1,915.68-1,223.97

Finding the Fourth Proportional to 1,285.89, 1,915.68 and 1,223.97

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Solution

The fourth proportional to 1,285.89, 1,915.68 and 1,223.97 is: 1,823.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.89 : 1,915.68 = 1,223.97 : x
  2. Step 2: Convert to fraction form
    1,285.89/1,915.68 = 1,223.97/x
  3. Step 3: Cross multiply
    1,285.89x = 1,915.68 × 1,223.97
  4. Step 4: Simplify right side
    1,285.89x = 2,344,734.85
  5. Step 5: Solve for x
    x = 2,344,734.85/1,285.89
  6. Step 6: Final answer
    x = 1,823.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.