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Finding the Fourth Proportional to 579.50, 869.32 and 189.54

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Solution

The fourth proportional to 579.50, 869.32 and 189.54 is: 284.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.50 : 869.32 = 189.54 : x
  2. Step 2: Convert to fraction form
    579.50/869.32 = 189.54/x
  3. Step 3: Cross multiply
    579.50x = 869.32 × 189.54
  4. Step 4: Simplify right side
    579.50x = 164,768.27
  5. Step 5: Solve for x
    x = 164,768.27/579.50
  6. Step 6: Final answer
    x = 284.33

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.