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Finding the Fourth Proportional to 609.21, 913.80 and 170.49

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Solution

The fourth proportional to 609.21, 913.80 and 170.49 is: 255.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.21 : 913.80 = 170.49 : x
  2. Step 2: Convert to fraction form
    609.21/913.80 = 170.49/x
  3. Step 3: Cross multiply
    609.21x = 913.80 × 170.49
  4. Step 4: Simplify right side
    609.21x = 155,793.76
  5. Step 5: Solve for x
    x = 155,793.76/609.21
  6. Step 6: Final answer
    x = 255.73

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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.