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Finding the Fourth Proportional to 618.20, 926.62 and 344.16

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Solution

The fourth proportional to 618.20, 926.62 and 344.16 is: 515.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.20 : 926.62 = 344.16 : x
  2. Step 2: Convert to fraction form
    618.20/926.62 = 344.16/x
  3. Step 3: Cross multiply
    618.20x = 926.62 × 344.16
  4. Step 4: Simplify right side
    618.20x = 318,905.54
  5. Step 5: Solve for x
    x = 318,905.54/618.20
  6. Step 6: Final answer
    x = 515.86

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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.