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Finding the Fourth Proportional to 158.42, 219.74 and 151.70

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Solution

The fourth proportional to 158.42, 219.74 and 151.70 is: 210.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.42 : 219.74 = 151.70 : x
  2. Step 2: Convert to fraction form
    158.42/219.74 = 151.70/x
  3. Step 3: Cross multiply
    158.42x = 219.74 × 151.70
  4. Step 4: Simplify right side
    158.42x = 33,333.80
  5. Step 5: Solve for x
    x = 33,333.80/158.42
  6. Step 6: Final answer
    x = 210.41

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.