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Finding the Fourth Proportional to 579.33, 869.10 and 189.21

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Solution

The fourth proportional to 579.33, 869.10 and 189.21 is: 283.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.33 : 869.10 = 189.21 : x
  2. Step 2: Convert to fraction form
    579.33/869.10 = 189.21/x
  3. Step 3: Cross multiply
    579.33x = 869.10 × 189.21
  4. Step 4: Simplify right side
    579.33x = 164,442.41
  5. Step 5: Solve for x
    x = 164,442.41/579.33
  6. Step 6: Final answer
    x = 283.85

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Double scale
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Similar ratio
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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.