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Finding the Fourth Proportional to 3,566, 4,921.34 and 1,972.78

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Solution

The fourth proportional to 3,566, 4,921.34 and 1,972.78 is: 2,722.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,566 : 4,921.34 = 1,972.78 : x
  2. Step 2: Convert to fraction form
    3,566/4,921.34 = 1,972.78/x
  3. Step 3: Cross multiply
    3,566x = 4,921.34 × 1,972.78
  4. Step 4: Simplify right side
    3,566x = 9,708,721.13
  5. Step 5: Solve for x
    x = 9,708,721.13/3,566
  6. Step 6: Final answer
    x = 2,722.58

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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.