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Finding the Fourth Proportional to 922.01, 1,383.17 and 459.81

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Solution

The fourth proportional to 922.01, 1,383.17 and 459.81 is: 689.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.01 : 1,383.17 = 459.81 : x
  2. Step 2: Convert to fraction form
    922.01/1,383.17 = 459.81/x
  3. Step 3: Cross multiply
    922.01x = 1,383.17 × 459.81
  4. Step 4: Simplify right side
    922.01x = 635,993.90
  5. Step 5: Solve for x
    x = 635,993.90/922.01
  6. Step 6: Final answer
    x = 689.79

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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.