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Finding the Fourth Proportional to 2,320.74, 3,481.09 and 761.82

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Solution

The fourth proportional to 2,320.74, 3,481.09 and 761.82 is: 1,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,320.74 : 3,481.09 = 761.82 : x
  2. Step 2: Convert to fraction form
    2,320.74/3,481.09 = 761.82/x
  3. Step 3: Cross multiply
    2,320.74x = 3,481.09 × 761.82
  4. Step 4: Simplify right side
    2,320.74x = 2,651,960.17
  5. Step 5: Solve for x
    x = 2,651,960.17/2,320.74
  6. Step 6: Final answer
    x = 1,142.72

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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.