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Finding the Fourth Proportional to 3,978.45, 5,967.68 and 2,515.59

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Solution

The fourth proportional to 3,978.45, 5,967.68 and 2,515.59 is: 3,773.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978.45 : 5,967.68 = 2,515.59 : x
  2. Step 2: Convert to fraction form
    3,978.45/5,967.68 = 2,515.59/x
  3. Step 3: Cross multiply
    3,978.45x = 5,967.68 × 2,515.59
  4. Step 4: Simplify right side
    3,978.45x = 15,012,223.55
  5. Step 5: Solve for x
    x = 15,012,223.55/3,978.45
  6. Step 6: Final answer
    x = 3,773.39

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1.5x scale

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.