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Finding the Fourth Proportional to 2,326.32, 3,489.70 and 765.68

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Solution

The fourth proportional to 2,326.32, 3,489.70 and 765.68 is: 1,148.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,326.32 : 3,489.70 = 765.68 : x
  2. Step 2: Convert to fraction form
    2,326.32/3,489.70 = 765.68/x
  3. Step 3: Cross multiply
    2,326.32x = 3,489.70 × 765.68
  4. Step 4: Simplify right side
    2,326.32x = 2,672,009.69
  5. Step 5: Solve for x
    x = 2,672,009.69/2,326.32
  6. Step 6: Final answer
    x = 1,148.60

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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.