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Finding the Fourth Proportional to 422.07, 633.17 and 319.02

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Solution

The fourth proportional to 422.07, 633.17 and 319.02 is: 478.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.07 : 633.17 = 319.02 : x
  2. Step 2: Convert to fraction form
    422.07/633.17 = 319.02/x
  3. Step 3: Cross multiply
    422.07x = 633.17 × 319.02
  4. Step 4: Simplify right side
    422.07x = 201,993.89
  5. Step 5: Solve for x
    x = 201,993.89/422.07
  6. Step 6: Final answer
    x = 478.58

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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.