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Finding the Fourth Proportional to 158.53, 219.90 and 154.32

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Solution

The fourth proportional to 158.53, 219.90 and 154.32 is: 214.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    158.53 : 219.90 = 154.32 : x
  2. Step 2: Convert to fraction form
    158.53/219.90 = 154.32/x
  3. Step 3: Cross multiply
    158.53x = 219.90 × 154.32
  4. Step 4: Simplify right side
    158.53x = 33,934.20
  5. Step 5: Solve for x
    x = 33,934.20/158.53
  6. Step 6: Final answer
    x = 214.05

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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.