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Finding the Fourth Proportional to 608.91, 912.58 and 261.84

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Solution

The fourth proportional to 608.91, 912.58 and 261.84 is: 392.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.91 : 912.58 = 261.84 : x
  2. Step 2: Convert to fraction form
    608.91/912.58 = 261.84/x
  3. Step 3: Cross multiply
    608.91x = 912.58 × 261.84
  4. Step 4: Simplify right side
    608.91x = 238,949.95
  5. Step 5: Solve for x
    x = 238,949.95/608.91
  6. Step 6: Final answer
    x = 392.42

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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.