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Finding the Fourth Proportional to 617.93, 927.01 and 398.79

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Solution

The fourth proportional to 617.93, 927.01 and 398.79 is: 598.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.93 : 927.01 = 398.79 : x
  2. Step 2: Convert to fraction form
    617.93/927.01 = 398.79/x
  3. Step 3: Cross multiply
    617.93x = 927.01 × 398.79
  4. Step 4: Simplify right side
    617.93x = 369,682.82
  5. Step 5: Solve for x
    x = 369,682.82/617.93
  6. Step 6: Final answer
    x = 598.26

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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.