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Finding the Fourth Proportional to 657.20, 985.84 and 194.98

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Solution

The fourth proportional to 657.20, 985.84 and 194.98 is: 292.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.20 : 985.84 = 194.98 : x
  2. Step 2: Convert to fraction form
    657.20/985.84 = 194.98/x
  3. Step 3: Cross multiply
    657.20x = 985.84 × 194.98
  4. Step 4: Simplify right side
    657.20x = 192,219.08
  5. Step 5: Solve for x
    x = 192,219.08/657.20
  6. Step 6: Final answer
    x = 292.48

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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.