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Finding the Fourth Proportional to 406.74, 561.33 and 232.11

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Solution

The fourth proportional to 406.74, 561.33 and 232.11 is: 320.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.74 : 561.33 = 232.11 : x
  2. Step 2: Convert to fraction form
    406.74/561.33 = 232.11/x
  3. Step 3: Cross multiply
    406.74x = 561.33 × 232.11
  4. Step 4: Simplify right side
    406.74x = 130,290.31
  5. Step 5: Solve for x
    x = 130,290.31/406.74
  6. Step 6: Final answer
    x = 320.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.