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Finding the Fourth Proportional to 309.33, 463.46 and 146.79

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Solution

The fourth proportional to 309.33, 463.46 and 146.79 is: 219.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.33 : 463.46 = 146.79 : x
  2. Step 2: Convert to fraction form
    309.33/463.46 = 146.79/x
  3. Step 3: Cross multiply
    309.33x = 463.46 × 146.79
  4. Step 4: Simplify right side
    309.33x = 68,030.56
  5. Step 5: Solve for x
    x = 68,030.56/309.33
  6. Step 6: Final answer
    x = 219.93

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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.