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Finding the Fourth Proportional to 656.80, 985.19 and 194.57

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Solution

The fourth proportional to 656.80, 985.19 and 194.57 is: 291.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.80 : 985.19 = 194.57 : x
  2. Step 2: Convert to fraction form
    656.80/985.19 = 194.57/x
  3. Step 3: Cross multiply
    656.80x = 985.19 × 194.57
  4. Step 4: Simplify right side
    656.80x = 191,692.85
  5. Step 5: Solve for x
    x = 191,692.85/656.80
  6. Step 6: Final answer
    x = 291.86

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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.