Home / 1,915.67-2,642.09-1,286.01

Finding the Fourth Proportional to 1,915.67, 2,642.09 and 1,286.01

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Solution

The fourth proportional to 1,915.67, 2,642.09 and 1,286.01 is: 1,773.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.67 : 2,642.09 = 1,286.01 : x
  2. Step 2: Convert to fraction form
    1,915.67/2,642.09 = 1,286.01/x
  3. Step 3: Cross multiply
    1,915.67x = 2,642.09 × 1,286.01
  4. Step 4: Simplify right side
    1,915.67x = 3,397,747.73
  5. Step 5: Solve for x
    x = 3,397,747.73/1,915.67
  6. Step 6: Final answer
    x = 1,773.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.