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Finding the Fourth Proportional to 405.98, 608.90 and 132.07

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Solution

The fourth proportional to 405.98, 608.90 and 132.07 is: 198.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.98 : 608.90 = 132.07 : x
  2. Step 2: Convert to fraction form
    405.98/608.90 = 132.07/x
  3. Step 3: Cross multiply
    405.98x = 608.90 × 132.07
  4. Step 4: Simplify right side
    405.98x = 80,416.83
  5. Step 5: Solve for x
    x = 80,416.83/405.98
  6. Step 6: Final answer
    x = 198.08

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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.