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Finding the Fourth Proportional to 608.43, 912.65 and 261.82

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Solution

The fourth proportional to 608.43, 912.65 and 261.82 is: 392.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.43 : 912.65 = 261.82 : x
  2. Step 2: Convert to fraction form
    608.43/912.65 = 261.82/x
  3. Step 3: Cross multiply
    608.43x = 912.65 × 261.82
  4. Step 4: Simplify right side
    608.43x = 238,950.02
  5. Step 5: Solve for x
    x = 238,950.02/608.43
  6. Step 6: Final answer
    x = 392.73

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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.