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Finding the Fourth Proportional to 618.38, 926.54 and 344.32

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Solution

The fourth proportional to 618.38, 926.54 and 344.32 is: 515.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.38 : 926.54 = 344.32 : x
  2. Step 2: Convert to fraction form
    618.38/926.54 = 344.32/x
  3. Step 3: Cross multiply
    618.38x = 926.54 × 344.32
  4. Step 4: Simplify right side
    618.38x = 319,023.51
  5. Step 5: Solve for x
    x = 319,023.51/618.38
  6. Step 6: Final answer
    x = 515.90

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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.