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Finding the Fourth Proportional to 405.91, 608.87 and 222.90

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Solution

The fourth proportional to 405.91, 608.87 and 222.90 is: 334.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.91 : 608.87 = 222.90 : x
  2. Step 2: Convert to fraction form
    405.91/608.87 = 222.90/x
  3. Step 3: Cross multiply
    405.91x = 608.87 × 222.90
  4. Step 4: Simplify right side
    405.91x = 135,717.57
  5. Step 5: Solve for x
    x = 135,717.57/405.91
  6. Step 6: Final answer
    x = 334.35

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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.