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Finding the Fourth Proportional to 618.76, 927.87 and 330.13

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Solution

The fourth proportional to 618.76, 927.87 and 330.13 is: 495.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.76 : 927.87 = 330.13 : x
  2. Step 2: Convert to fraction form
    618.76/927.87 = 330.13/x
  3. Step 3: Cross multiply
    618.76x = 927.87 × 330.13
  4. Step 4: Simplify right side
    618.76x = 306,317.72
  5. Step 5: Solve for x
    x = 306,317.72/618.76
  6. Step 6: Final answer
    x = 495.05

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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.