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Finding the Fourth Proportional to 623.44, 935.16 and 408.38

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Solution

The fourth proportional to 623.44, 935.16 and 408.38 is: 612.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.44 : 935.16 = 408.38 : x
  2. Step 2: Convert to fraction form
    623.44/935.16 = 408.38/x
  3. Step 3: Cross multiply
    623.44x = 935.16 × 408.38
  4. Step 4: Simplify right side
    623.44x = 381,900.64
  5. Step 5: Solve for x
    x = 381,900.64/623.44
  6. Step 6: Final answer
    x = 612.57

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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.