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Finding the Fourth Proportional to 608.39, 912.48 and 388.36

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Solution

The fourth proportional to 608.39, 912.48 and 388.36 is: 582.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.39 : 912.48 = 388.36 : x
  2. Step 2: Convert to fraction form
    608.39/912.48 = 388.36/x
  3. Step 3: Cross multiply
    608.39x = 912.48 × 388.36
  4. Step 4: Simplify right side
    608.39x = 354,370.42
  5. Step 5: Solve for x
    x = 354,370.42/608.39
  6. Step 6: Final answer
    x = 582.47

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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.