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Finding the Fourth Proportional to 618.78, 928.38 and 294.11

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Solution

The fourth proportional to 618.78, 928.38 and 294.11 is: 441.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.78 : 928.38 = 294.11 : x
  2. Step 2: Convert to fraction form
    618.78/928.38 = 294.11/x
  3. Step 3: Cross multiply
    618.78x = 928.38 × 294.11
  4. Step 4: Simplify right side
    618.78x = 273,041.20
  5. Step 5: Solve for x
    x = 273,041.20/618.78
  6. Step 6: Final answer
    x = 441.26

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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.