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Finding the Fourth Proportional to 405.90, 608.67 and 132.03

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Solution

The fourth proportional to 405.90, 608.67 and 132.03 is: 197.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.90 : 608.67 = 132.03 : x
  2. Step 2: Convert to fraction form
    405.90/608.67 = 132.03/x
  3. Step 3: Cross multiply
    405.90x = 608.67 × 132.03
  4. Step 4: Simplify right side
    405.90x = 80,362.70
  5. Step 5: Solve for x
    x = 80,362.70/405.90
  6. Step 6: Final answer
    x = 197.99

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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.