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Finding the Fourth Proportional to 3,158.75, 4,739.15 and 1,515.42

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Solution

The fourth proportional to 3,158.75, 4,739.15 and 1,515.42 is: 2,273.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,158.75 : 4,739.15 = 1,515.42 : x
  2. Step 2: Convert to fraction form
    3,158.75/4,739.15 = 1,515.42/x
  3. Step 3: Cross multiply
    3,158.75x = 4,739.15 × 1,515.42
  4. Step 4: Simplify right side
    3,158.75x = 7,181,795.12
  5. Step 5: Solve for x
    x = 7,181,795.12/3,158.75
  6. Step 6: Final answer
    x = 2,273.62

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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.