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Finding the Fourth Proportional to 618.45, 927.95 and 253.32

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Solution

The fourth proportional to 618.45, 927.95 and 253.32 is: 380.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.45 : 927.95 = 253.32 : x
  2. Step 2: Convert to fraction form
    618.45/927.95 = 253.32/x
  3. Step 3: Cross multiply
    618.45x = 927.95 × 253.32
  4. Step 4: Simplify right side
    618.45x = 235,067.03
  5. Step 5: Solve for x
    x = 235,067.03/618.45
  6. Step 6: Final answer
    x = 380.09

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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.