Home / 3,945.90-5,915.36-1,479

Finding the Fourth Proportional to 3,945.90, 5,915.36 and 1,479

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Solution

The fourth proportional to 3,945.90, 5,915.36 and 1,479 is: 2,217.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.90 : 5,915.36 = 1,479 : x
  2. Step 2: Convert to fraction form
    3,945.90/5,915.36 = 1,479/x
  3. Step 3: Cross multiply
    3,945.90x = 5,915.36 × 1,479
  4. Step 4: Simplify right side
    3,945.90x = 8,748,817.44
  5. Step 5: Solve for x
    x = 8,748,817.44/3,945.90
  6. Step 6: Final answer
    x = 2,217.19

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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.