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Finding the Fourth Proportional to 579.39, 868.68 and 290.67

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Solution

The fourth proportional to 579.39, 868.68 and 290.67 is: 435.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.39 : 868.68 = 290.67 : x
  2. Step 2: Convert to fraction form
    579.39/868.68 = 290.67/x
  3. Step 3: Cross multiply
    579.39x = 868.68 × 290.67
  4. Step 4: Simplify right side
    579.39x = 252,499.22
  5. Step 5: Solve for x
    x = 252,499.22/579.39
  6. Step 6: Final answer
    x = 435.80

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.