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Finding the Fourth Proportional to 618.15, 927.14 and 432.49

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Solution

The fourth proportional to 618.15, 927.14 and 432.49 is: 648.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.15 : 927.14 = 432.49 : x
  2. Step 2: Convert to fraction form
    618.15/927.14 = 432.49/x
  3. Step 3: Cross multiply
    618.15x = 927.14 × 432.49
  4. Step 4: Simplify right side
    618.15x = 400,978.78
  5. Step 5: Solve for x
    x = 400,978.78/618.15
  6. Step 6: Final answer
    x = 648.68

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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.