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Finding the Fourth Proportional to 2,713.32, 4,070.21 and 765.54

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Solution

The fourth proportional to 2,713.32, 4,070.21 and 765.54 is: 1,148.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.32 : 4,070.21 = 765.54 : x
  2. Step 2: Convert to fraction form
    2,713.32/4,070.21 = 765.54/x
  3. Step 3: Cross multiply
    2,713.32x = 4,070.21 × 765.54
  4. Step 4: Simplify right side
    2,713.32x = 3,115,904.74
  5. Step 5: Solve for x
    x = 3,115,904.74/2,713.32
  6. Step 6: Final answer
    x = 1,148.37

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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.