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Finding the Fourth Proportional to 407.98, 611.97 and 225.33

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Solution

The fourth proportional to 407.98, 611.97 and 225.33 is: 338.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.98 : 611.97 = 225.33 : x
  2. Step 2: Convert to fraction form
    407.98/611.97 = 225.33/x
  3. Step 3: Cross multiply
    407.98x = 611.97 × 225.33
  4. Step 4: Simplify right side
    407.98x = 137,895.20
  5. Step 5: Solve for x
    x = 137,895.20/407.98
  6. Step 6: Final answer
    x = 338.00

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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.