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Finding the Fourth Proportional to 158.07, 217.70 and 149.84

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Solution

The fourth proportional to 158.07, 217.70 and 149.84 is: 206.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.07 : 217.70 = 149.84 : x
  2. Step 2: Convert to fraction form
    158.07/217.70 = 149.84/x
  3. Step 3: Cross multiply
    158.07x = 217.70 × 149.84
  4. Step 4: Simplify right side
    158.07x = 32,619.08
  5. Step 5: Solve for x
    x = 32,619.08/158.07
  6. Step 6: Final answer
    x = 206.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.