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Finding the Fourth Proportional to 554.64, 831.79 and 261.97

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Solution

The fourth proportional to 554.64, 831.79 and 261.97 is: 392.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.64 : 831.79 = 261.97 : x
  2. Step 2: Convert to fraction form
    554.64/831.79 = 261.97/x
  3. Step 3: Cross multiply
    554.64x = 831.79 × 261.97
  4. Step 4: Simplify right side
    554.64x = 217,902.72
  5. Step 5: Solve for x
    x = 217,902.72/554.64
  6. Step 6: Final answer
    x = 392.88

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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.