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Finding the Fourth Proportional to 3,951.61, 5,914.55 and 2,911.20

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Solution

The fourth proportional to 3,951.61, 5,914.55 and 2,911.20 is: 4,357.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.61 : 5,914.55 = 2,911.20 : x
  2. Step 2: Convert to fraction form
    3,951.61/5,914.55 = 2,911.20/x
  3. Step 3: Cross multiply
    3,951.61x = 5,914.55 × 2,911.20
  4. Step 4: Simplify right side
    3,951.61x = 17,218,437.96
  5. Step 5: Solve for x
    x = 17,218,437.96/3,951.61
  6. Step 6: Final answer
    x = 4,357.32

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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.