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Finding the Fourth Proportional to 618.04, 926.44 and 398.88

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Solution

The fourth proportional to 618.04, 926.44 and 398.88 is: 597.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    618.04 : 926.44 = 398.88 : x
  2. Step 2: Convert to fraction form
    618.04/926.44 = 398.88/x
  3. Step 3: Cross multiply
    618.04x = 926.44 × 398.88
  4. Step 4: Simplify right side
    618.04x = 369,538.39
  5. Step 5: Solve for x
    x = 369,538.39/618.04
  6. Step 6: Final answer
    x = 597.92

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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.