Home / 3,915.48-5,868.90-1,605

Finding the Fourth Proportional to 3,915.48, 5,868.90 and 1,605

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Solution

The fourth proportional to 3,915.48, 5,868.90 and 1,605 is: 2,405.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,915.48 : 5,868.90 = 1,605 : x
  2. Step 2: Convert to fraction form
    3,915.48/5,868.90 = 1,605/x
  3. Step 3: Cross multiply
    3,915.48x = 5,868.90 × 1,605
  4. Step 4: Simplify right side
    3,915.48x = 9,419,584.50
  5. Step 5: Solve for x
    x = 9,419,584.50/3,915.48
  6. Step 6: Final answer
    x = 2,405.73

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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.