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Finding the Fourth Proportional to 2,713.55, 4,070.30 and 765.71

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Solution

The fourth proportional to 2,713.55, 4,070.30 and 765.71 is: 1,148.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.55 : 4,070.30 = 765.71 : x
  2. Step 2: Convert to fraction form
    2,713.55/4,070.30 = 765.71/x
  3. Step 3: Cross multiply
    2,713.55x = 4,070.30 × 765.71
  4. Step 4: Simplify right side
    2,713.55x = 3,116,669.41
  5. Step 5: Solve for x
    x = 3,116,669.41/2,713.55
  6. Step 6: Final answer
    x = 1,148.56

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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.