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Finding the Fourth Proportional to 423.51, 635.27 and 115.40

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Solution

The fourth proportional to 423.51, 635.27 and 115.40 is: 173.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.51 : 635.27 = 115.40 : x
  2. Step 2: Convert to fraction form
    423.51/635.27 = 115.40/x
  3. Step 3: Cross multiply
    423.51x = 635.27 × 115.40
  4. Step 4: Simplify right side
    423.51x = 73,306.98
  5. Step 5: Solve for x
    x = 73,306.98/423.51
  6. Step 6: Final answer
    x = 173.09

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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.