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Finding the Fourth Proportional to 657.20, 985.95 and 194.96

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Solution

The fourth proportional to 657.20, 985.95 and 194.96 is: 292.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    657.20 : 985.95 = 194.96 : x
  2. Step 2: Convert to fraction form
    657.20/985.95 = 194.96/x
  3. Step 3: Cross multiply
    657.20x = 985.95 × 194.96
  4. Step 4: Simplify right side
    657.20x = 192,215.88
  5. Step 5: Solve for x
    x = 192,215.88/657.20
  6. Step 6: Final answer
    x = 292.48

Related Problems

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.