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Finding the Fourth Proportional to 158.81, 217.58 and 154.35

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Solution

The fourth proportional to 158.81, 217.58 and 154.35 is: 211.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.81 : 217.58 = 154.35 : x
  2. Step 2: Convert to fraction form
    158.81/217.58 = 154.35/x
  3. Step 3: Cross multiply
    158.81x = 217.58 × 154.35
  4. Step 4: Simplify right side
    158.81x = 33,582.70
  5. Step 5: Solve for x
    x = 33,582.70/158.81
  6. Step 6: Final answer
    x = 211.47

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.