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Finding the Fourth Proportional to 618.69, 927.10 and 423.00

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Solution

The fourth proportional to 618.69, 927.10 and 423.00 is: 633.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.69 : 927.10 = 423.00 : x
  2. Step 2: Convert to fraction form
    618.69/927.10 = 423.00/x
  3. Step 3: Cross multiply
    618.69x = 927.10 × 423.00
  4. Step 4: Simplify right side
    618.69x = 392,158.84
  5. Step 5: Solve for x
    x = 392,158.84/618.69
  6. Step 6: Final answer
    x = 633.86

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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.