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Finding the Fourth Proportional to 650.79, 976.08 and 217.89

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Solution

The fourth proportional to 650.79, 976.08 and 217.89 is: 326.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.79 : 976.08 = 217.89 : x
  2. Step 2: Convert to fraction form
    650.79/976.08 = 217.89/x
  3. Step 3: Cross multiply
    650.79x = 976.08 × 217.89
  4. Step 4: Simplify right side
    650.79x = 212,678.07
  5. Step 5: Solve for x
    x = 212,678.07/650.79
  6. Step 6: Final answer
    x = 326.80

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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.