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Finding the Fourth Proportional to 158.14, 216.70 and 154.63

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Solution

The fourth proportional to 158.14, 216.70 and 154.63 is: 211.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.14 : 216.70 = 154.63 : x
  2. Step 2: Convert to fraction form
    158.14/216.70 = 154.63/x
  3. Step 3: Cross multiply
    158.14x = 216.70 × 154.63
  4. Step 4: Simplify right side
    158.14x = 33,508.32
  5. Step 5: Solve for x
    x = 33,508.32/158.14
  6. Step 6: Final answer
    x = 211.89

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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.