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Finding the Fourth Proportional to 623.62, 935.30 and 238.78

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Solution

The fourth proportional to 623.62, 935.30 and 238.78 is: 358.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.62 : 935.30 = 238.78 : x
  2. Step 2: Convert to fraction form
    623.62/935.30 = 238.78/x
  3. Step 3: Cross multiply
    623.62x = 935.30 × 238.78
  4. Step 4: Simplify right side
    623.62x = 223,330.93
  5. Step 5: Solve for x
    x = 223,330.93/623.62
  6. Step 6: Final answer
    x = 358.12

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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.