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Finding the Fourth Proportional to 579.44, 869.20 and 194.56

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Solution

The fourth proportional to 579.44, 869.20 and 194.56 is: 291.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.44 : 869.20 = 194.56 : x
  2. Step 2: Convert to fraction form
    579.44/869.20 = 194.56/x
  3. Step 3: Cross multiply
    579.44x = 869.20 × 194.56
  4. Step 4: Simplify right side
    579.44x = 169,111.55
  5. Step 5: Solve for x
    x = 169,111.55/579.44
  6. Step 6: Final answer
    x = 291.85

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.