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Finding the Fourth Proportional to 609.13, 913.69 and 153.13

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Solution

The fourth proportional to 609.13, 913.69 and 153.13 is: 229.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.13 : 913.69 = 153.13 : x
  2. Step 2: Convert to fraction form
    609.13/913.69 = 153.13/x
  3. Step 3: Cross multiply
    609.13x = 913.69 × 153.13
  4. Step 4: Simplify right side
    609.13x = 139,913.35
  5. Step 5: Solve for x
    x = 139,913.35/609.13
  6. Step 6: Final answer
    x = 229.69

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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.