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Finding the Fourth Proportional to 263.48, 394.90 and 133.58

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Solution

The fourth proportional to 263.48, 394.90 and 133.58 is: 200.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.48 : 394.90 = 133.58 : x
  2. Step 2: Convert to fraction form
    263.48/394.90 = 133.58/x
  3. Step 3: Cross multiply
    263.48x = 394.90 × 133.58
  4. Step 4: Simplify right side
    263.48x = 52,751.40
  5. Step 5: Solve for x
    x = 52,751.40/263.48
  6. Step 6: Final answer
    x = 200.21

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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.