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Finding the Fourth Proportional to 1,324.76, 1,828.49 and 765.55

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Solution

The fourth proportional to 1,324.76, 1,828.49 and 765.55 is: 1,056.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,324.76 : 1,828.49 = 765.55 : x
  2. Step 2: Convert to fraction form
    1,324.76/1,828.49 = 765.55/x
  3. Step 3: Cross multiply
    1,324.76x = 1,828.49 × 765.55
  4. Step 4: Simplify right side
    1,324.76x = 1,399,802.73
  5. Step 5: Solve for x
    x = 1,399,802.73/1,324.76
  6. Step 6: Final answer
    x = 1,056.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.