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Finding the Fourth Proportional to 3,721.28, 5,582.07 and 947.97

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Solution

The fourth proportional to 3,721.28, 5,582.07 and 947.97 is: 1,422.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.28 : 5,582.07 = 947.97 : x
  2. Step 2: Convert to fraction form
    3,721.28/5,582.07 = 947.97/x
  3. Step 3: Cross multiply
    3,721.28x = 5,582.07 × 947.97
  4. Step 4: Simplify right side
    3,721.28x = 5,291,634.90
  5. Step 5: Solve for x
    x = 5,291,634.90/3,721.28
  6. Step 6: Final answer
    x = 1,422.00

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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.