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Finding the Fourth Proportional to 309.38, 463.95 and 263.09

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Solution

The fourth proportional to 309.38, 463.95 and 263.09 is: 394.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.38 : 463.95 = 263.09 : x
  2. Step 2: Convert to fraction form
    309.38/463.95 = 263.09/x
  3. Step 3: Cross multiply
    309.38x = 463.95 × 263.09
  4. Step 4: Simplify right side
    309.38x = 122,061.01
  5. Step 5: Solve for x
    x = 122,061.01/309.38
  6. Step 6: Final answer
    x = 394.54

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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.