Home / 1,915.14-2,639.49-1,648.90

Finding the Fourth Proportional to 1,915.14, 2,639.49 and 1,648.90

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Solution

The fourth proportional to 1,915.14, 2,639.49 and 1,648.90 is: 2,272.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,915.14 : 2,639.49 = 1,648.90 : x
  2. Step 2: Convert to fraction form
    1,915.14/2,639.49 = 1,648.90/x
  3. Step 3: Cross multiply
    1,915.14x = 2,639.49 × 1,648.90
  4. Step 4: Simplify right side
    1,915.14x = 4,352,241.86
  5. Step 5: Solve for x
    x = 4,352,241.86/1,915.14
  6. Step 6: Final answer
    x = 2,272.55

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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.