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Finding the Fourth Proportional to 423.81, 635.94 and 207.45

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Solution

The fourth proportional to 423.81, 635.94 and 207.45 is: 311.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.81 : 635.94 = 207.45 : x
  2. Step 2: Convert to fraction form
    423.81/635.94 = 207.45/x
  3. Step 3: Cross multiply
    423.81x = 635.94 × 207.45
  4. Step 4: Simplify right side
    423.81x = 131,925.75
  5. Step 5: Solve for x
    x = 131,925.75/423.81
  6. Step 6: Final answer
    x = 311.29

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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.