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Finding the Fourth Proportional to 3,959.67, 5,943.69 and 2,920.89

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Solution

The fourth proportional to 3,959.67, 5,943.69 and 2,920.89 is: 4,384.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,959.67 : 5,943.69 = 2,920.89 : x
  2. Step 2: Convert to fraction form
    3,959.67/5,943.69 = 2,920.89/x
  3. Step 3: Cross multiply
    3,959.67x = 5,943.69 × 2,920.89
  4. Step 4: Simplify right side
    3,959.67x = 17,360,864.68
  5. Step 5: Solve for x
    x = 17,360,864.68/3,959.67
  6. Step 6: Final answer
    x = 4,384.42

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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.