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Finding the Fourth Proportional to 2,713.44, 4,070.31 and 765.81

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Solution

The fourth proportional to 2,713.44, 4,070.31 and 765.81 is: 1,148.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.44 : 4,070.31 = 765.81 : x
  2. Step 2: Convert to fraction form
    2,713.44/4,070.31 = 765.81/x
  3. Step 3: Cross multiply
    2,713.44x = 4,070.31 × 765.81
  4. Step 4: Simplify right side
    2,713.44x = 3,117,084.10
  5. Step 5: Solve for x
    x = 3,117,084.10/2,713.44
  6. Step 6: Final answer
    x = 1,148.76

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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.