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Finding the Fourth Proportional to 309.48, 463.98 and 133.68

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Solution

The fourth proportional to 309.48, 463.98 and 133.68 is: 200.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.48 : 463.98 = 133.68 : x
  2. Step 2: Convert to fraction form
    309.48/463.98 = 133.68/x
  3. Step 3: Cross multiply
    309.48x = 463.98 × 133.68
  4. Step 4: Simplify right side
    309.48x = 62,024.85
  5. Step 5: Solve for x
    x = 62,024.85/309.48
  6. Step 6: Final answer
    x = 200.42

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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.