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Finding the Fourth Proportional to 2,252.66, 3,378.55 and 771.78

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Solution

The fourth proportional to 2,252.66, 3,378.55 and 771.78 is: 1,157.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,252.66 : 3,378.55 = 771.78 : x
  2. Step 2: Convert to fraction form
    2,252.66/3,378.55 = 771.78/x
  3. Step 3: Cross multiply
    2,252.66x = 3,378.55 × 771.78
  4. Step 4: Simplify right side
    2,252.66x = 2,607,497.32
  5. Step 5: Solve for x
    x = 2,607,497.32/2,252.66
  6. Step 6: Final answer
    x = 1,157.52

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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.