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Finding the Fourth Proportional to 579.10, 868.55 and 189.11

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Solution

The fourth proportional to 579.10, 868.55 and 189.11 is: 283.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.10 : 868.55 = 189.11 : x
  2. Step 2: Convert to fraction form
    579.10/868.55 = 189.11/x
  3. Step 3: Cross multiply
    579.10x = 868.55 × 189.11
  4. Step 4: Simplify right side
    579.10x = 164,251.49
  5. Step 5: Solve for x
    x = 164,251.49/579.10
  6. Step 6: Final answer
    x = 283.63

Related Problems

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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.