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Finding the Fourth Proportional to 423.34, 635.02 and 239.42

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Solution

The fourth proportional to 423.34, 635.02 and 239.42 is: 359.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.34 : 635.02 = 239.42 : x
  2. Step 2: Convert to fraction form
    423.34/635.02 = 239.42/x
  3. Step 3: Cross multiply
    423.34x = 635.02 × 239.42
  4. Step 4: Simplify right side
    423.34x = 152,036.49
  5. Step 5: Solve for x
    x = 152,036.49/423.34
  6. Step 6: Final answer
    x = 359.14

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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.