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Finding the Fourth Proportional to 405.45, 608.13 and 116.89

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Solution

The fourth proportional to 405.45, 608.13 and 116.89 is: 175.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.45 : 608.13 = 116.89 : x
  2. Step 2: Convert to fraction form
    405.45/608.13 = 116.89/x
  3. Step 3: Cross multiply
    405.45x = 608.13 × 116.89
  4. Step 4: Simplify right side
    405.45x = 71,082.80
  5. Step 5: Solve for x
    x = 71,082.80/405.45
  6. Step 6: Final answer
    x = 175.32

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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.