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Finding the Fourth Proportional to 613.13, 919.57 and 180.17

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Solution

The fourth proportional to 613.13, 919.57 and 180.17 is: 270.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.13 : 919.57 = 180.17 : x
  2. Step 2: Convert to fraction form
    613.13/919.57 = 180.17/x
  3. Step 3: Cross multiply
    613.13x = 919.57 × 180.17
  4. Step 4: Simplify right side
    613.13x = 165,678.93
  5. Step 5: Solve for x
    x = 165,678.93/613.13
  6. Step 6: Final answer
    x = 270.22

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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.