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Finding the Fourth Proportional to 618.66, 927.59 and 272.12

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Solution

The fourth proportional to 618.66, 927.59 and 272.12 is: 407.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.66 : 927.59 = 272.12 : x
  2. Step 2: Convert to fraction form
    618.66/927.59 = 272.12/x
  3. Step 3: Cross multiply
    618.66x = 927.59 × 272.12
  4. Step 4: Simplify right side
    618.66x = 252,409.79
  5. Step 5: Solve for x
    x = 252,409.79/618.66
  6. Step 6: Final answer
    x = 407.99

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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.