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Finding the Fourth Proportional to 1,107.28, 1,661.33 and 522.46

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Solution

The fourth proportional to 1,107.28, 1,661.33 and 522.46 is: 783.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,107.28 : 1,661.33 = 522.46 : x
  2. Step 2: Convert to fraction form
    1,107.28/1,661.33 = 522.46/x
  3. Step 3: Cross multiply
    1,107.28x = 1,661.33 × 522.46
  4. Step 4: Simplify right side
    1,107.28x = 867,978.47
  5. Step 5: Solve for x
    x = 867,978.47/1,107.28
  6. Step 6: Final answer
    x = 783.88

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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.