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Finding the Fourth Proportional to 416.94, 621.24 and 398.31

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Solution

The fourth proportional to 416.94, 621.24 and 398.31 is: 593.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.94 : 621.24 = 398.31 : x
  2. Step 2: Convert to fraction form
    416.94/621.24 = 398.31/x
  3. Step 3: Cross multiply
    416.94x = 621.24 × 398.31
  4. Step 4: Simplify right side
    416.94x = 247,446.10
  5. Step 5: Solve for x
    x = 247,446.10/416.94
  6. Step 6: Final answer
    x = 593.48

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.