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Finding the Fourth Proportional to 405.32, 608.00 and 116.78

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Solution

The fourth proportional to 405.32, 608.00 and 116.78 is: 175.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.32 : 608.00 = 116.78 : x
  2. Step 2: Convert to fraction form
    405.32/608.00 = 116.78/x
  3. Step 3: Cross multiply
    405.32x = 608.00 × 116.78
  4. Step 4: Simplify right side
    405.32x = 70,998.62
  5. Step 5: Solve for x
    x = 70,998.62/405.32
  6. Step 6: Final answer
    x = 175.17

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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.