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Finding the Fourth Proportional to 399.08, 602.48 and 396.92

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Solution

The fourth proportional to 399.08, 602.48 and 396.92 is: 599.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.08 : 602.48 = 396.92 : x
  2. Step 2: Convert to fraction form
    399.08/602.48 = 396.92/x
  3. Step 3: Cross multiply
    399.08x = 602.48 × 396.92
  4. Step 4: Simplify right side
    399.08x = 239,136.36
  5. Step 5: Solve for x
    x = 239,136.36/399.08
  6. Step 6: Final answer
    x = 599.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.