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Finding the Fourth Proportional to 437.80, 657 and 194.50

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Solution

The fourth proportional to 437.80, 657 and 194.50 is: 291.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.80 : 657 = 194.50 : x
  2. Step 2: Convert to fraction form
    437.80/657 = 194.50/x
  3. Step 3: Cross multiply
    437.80x = 657 × 194.50
  4. Step 4: Simplify right side
    437.80x = 127,786.50
  5. Step 5: Solve for x
    x = 127,786.50/437.80
  6. Step 6: Final answer
    x = 291.88

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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.