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Finding the Fourth Proportional to 406.91, 609.66 and 291.14

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Solution

The fourth proportional to 406.91, 609.66 and 291.14 is: 436.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.91 : 609.66 = 291.14 : x
  2. Step 2: Convert to fraction form
    406.91/609.66 = 291.14/x
  3. Step 3: Cross multiply
    406.91x = 609.66 × 291.14
  4. Step 4: Simplify right side
    406.91x = 177,496.41
  5. Step 5: Solve for x
    x = 177,496.41/406.91
  6. Step 6: Final answer
    x = 436.21

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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.