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Finding the Fourth Proportional to 608.16, 913.26 and 378.39

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Solution

The fourth proportional to 608.16, 913.26 and 378.39 is: 568.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.16 : 913.26 = 378.39 : x
  2. Step 2: Convert to fraction form
    608.16/913.26 = 378.39/x
  3. Step 3: Cross multiply
    608.16x = 913.26 × 378.39
  4. Step 4: Simplify right side
    608.16x = 345,568.45
  5. Step 5: Solve for x
    x = 345,568.45/608.16
  6. Step 6: Final answer
    x = 568.22

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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.