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Finding the Fourth Proportional to 194.80, 291.88 and 146.72

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Solution

The fourth proportional to 194.80, 291.88 and 146.72 is: 219.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    194.80 : 291.88 = 146.72 : x
  2. Step 2: Convert to fraction form
    194.80/291.88 = 146.72/x
  3. Step 3: Cross multiply
    194.80x = 291.88 × 146.72
  4. Step 4: Simplify right side
    194.80x = 42,824.63
  5. Step 5: Solve for x
    x = 42,824.63/194.80
  6. Step 6: Final answer
    x = 219.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.