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Finding the Fourth Proportional to 3,967.80, 5,951.70 and 2,509.80

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Solution

The fourth proportional to 3,967.80, 5,951.70 and 2,509.80 is: 3,764.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,967.80 : 5,951.70 = 2,509.80 : x
  2. Step 2: Convert to fraction form
    3,967.80/5,951.70 = 2,509.80/x
  3. Step 3: Cross multiply
    3,967.80x = 5,951.70 × 2,509.80
  4. Step 4: Simplify right side
    3,967.80x = 14,937,576.66
  5. Step 5: Solve for x
    x = 14,937,576.66/3,967.80
  6. Step 6: Final answer
    x = 3,764.70

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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.