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Finding the Fourth Proportional to 922.28, 1,383.48 and 273.20

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Solution

The fourth proportional to 922.28, 1,383.48 and 273.20 is: 409.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.28 : 1,383.48 = 273.20 : x
  2. Step 2: Convert to fraction form
    922.28/1,383.48 = 273.20/x
  3. Step 3: Cross multiply
    922.28x = 1,383.48 × 273.20
  4. Step 4: Simplify right side
    922.28x = 377,966.74
  5. Step 5: Solve for x
    x = 377,966.74/922.28
  6. Step 6: Final answer
    x = 409.82

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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.