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Finding the Fourth Proportional to 613.44, 846.21 and 388.96

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Solution

The fourth proportional to 613.44, 846.21 and 388.96 is: 536.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.44 : 846.21 = 388.96 : x
  2. Step 2: Convert to fraction form
    613.44/846.21 = 388.96/x
  3. Step 3: Cross multiply
    613.44x = 846.21 × 388.96
  4. Step 4: Simplify right side
    613.44x = 329,145.49
  5. Step 5: Solve for x
    x = 329,145.49/613.44
  6. Step 6: Final answer
    x = 536.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.