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Finding the Fourth Proportional to 163.40, 245.88 and 153.68

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Solution

The fourth proportional to 163.40, 245.88 and 153.68 is: 231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.40 : 245.88 = 153.68 : x
  2. Step 2: Convert to fraction form
    163.40/245.88 = 153.68/x
  3. Step 3: Cross multiply
    163.40x = 245.88 × 153.68
  4. Step 4: Simplify right side
    163.40x = 37,786.84
  5. Step 5: Solve for x
    x = 37,786.84/163.40
  6. Step 6: Final answer
    x = 231.25

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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.