Home / 1,915.09-2,872.54-1,124.89

Finding the Fourth Proportional to 1,915.09, 2,872.54 and 1,124.89

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Solution

The fourth proportional to 1,915.09, 2,872.54 and 1,124.89 is: 1,687.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.09 : 2,872.54 = 1,124.89 : x
  2. Step 2: Convert to fraction form
    1,915.09/2,872.54 = 1,124.89/x
  3. Step 3: Cross multiply
    1,915.09x = 2,872.54 × 1,124.89
  4. Step 4: Simplify right side
    1,915.09x = 3,231,291.52
  5. Step 5: Solve for x
    x = 3,231,291.52/1,915.09
  6. Step 6: Final answer
    x = 1,687.28

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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.