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Finding the Fourth Proportional to 618.11, 927.31 and 435.86

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Solution

The fourth proportional to 618.11, 927.31 and 435.86 is: 653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.11 : 927.31 = 435.86 : x
  2. Step 2: Convert to fraction form
    618.11/927.31 = 435.86/x
  3. Step 3: Cross multiply
    618.11x = 927.31 × 435.86
  4. Step 4: Simplify right side
    618.11x = 404,176.72
  5. Step 5: Solve for x
    x = 404,176.72/618.11
  6. Step 6: Final answer
    x = 653.89

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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.