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Finding the Fourth Proportional to 423.35, 635.34 and 277.05

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Solution

The fourth proportional to 423.35, 635.34 and 277.05 is: 415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.35 : 635.34 = 277.05 : x
  2. Step 2: Convert to fraction form
    423.35/635.34 = 277.05/x
  3. Step 3: Cross multiply
    423.35x = 635.34 × 277.05
  4. Step 4: Simplify right side
    423.35x = 176,019.91
  5. Step 5: Solve for x
    x = 176,019.91/423.35
  6. Step 6: Final answer
    x = 415.78

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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.