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Finding the Fourth Proportional to 618.42, 927.94 and 387.26

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Solution

The fourth proportional to 618.42, 927.94 and 387.26 is: 581.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.42 : 927.94 = 387.26 : x
  2. Step 2: Convert to fraction form
    618.42/927.94 = 387.26/x
  3. Step 3: Cross multiply
    618.42x = 927.94 × 387.26
  4. Step 4: Simplify right side
    618.42x = 359,354.04
  5. Step 5: Solve for x
    x = 359,354.04/618.42
  6. Step 6: Final answer
    x = 581.08

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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.