Home / 3,915.14-5,872.72-1,319.90

Finding the Fourth Proportional to 3,915.14, 5,872.72 and 1,319.90

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Solution

The fourth proportional to 3,915.14, 5,872.72 and 1,319.90 is: 1,979.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.14 : 5,872.72 = 1,319.90 : x
  2. Step 2: Convert to fraction form
    3,915.14/5,872.72 = 1,319.90/x
  3. Step 3: Cross multiply
    3,915.14x = 5,872.72 × 1,319.90
  4. Step 4: Simplify right side
    3,915.14x = 7,751,403.13
  5. Step 5: Solve for x
    x = 7,751,403.13/3,915.14
  6. Step 6: Final answer
    x = 1,979.85

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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.