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Finding the Fourth Proportional to 618.94, 927.57 and 434.84

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Solution

The fourth proportional to 618.94, 927.57 and 434.84 is: 651.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.94 : 927.57 = 434.84 : x
  2. Step 2: Convert to fraction form
    618.94/927.57 = 434.84/x
  3. Step 3: Cross multiply
    618.94x = 927.57 × 434.84
  4. Step 4: Simplify right side
    618.94x = 403,344.54
  5. Step 5: Solve for x
    x = 403,344.54/618.94
  6. Step 6: Final answer
    x = 651.68

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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.