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Finding the Fourth Proportional to 618.72, 928.28 and 234

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Solution

The fourth proportional to 618.72, 928.28 and 234 is: 351.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.72 : 928.28 = 234 : x
  2. Step 2: Convert to fraction form
    618.72/928.28 = 234/x
  3. Step 3: Cross multiply
    618.72x = 928.28 × 234
  4. Step 4: Simplify right side
    618.72x = 217,217.52
  5. Step 5: Solve for x
    x = 217,217.52/618.72
  6. Step 6: Final answer
    x = 351.08

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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.