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Finding the Fourth Proportional to 623.78, 935.78 and 190.94

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Solution

The fourth proportional to 623.78, 935.78 and 190.94 is: 286.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.78 : 935.78 = 190.94 : x
  2. Step 2: Convert to fraction form
    623.78/935.78 = 190.94/x
  3. Step 3: Cross multiply
    623.78x = 935.78 × 190.94
  4. Step 4: Simplify right side
    623.78x = 178,673.63
  5. Step 5: Solve for x
    x = 178,673.63/623.78
  6. Step 6: Final answer
    x = 286.44

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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.