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Finding the Fourth Proportional to 919.62, 1,379.61 and 270.27

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Solution

The fourth proportional to 919.62, 1,379.61 and 270.27 is: 405.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    919.62 : 1,379.61 = 270.27 : x
  2. Step 2: Convert to fraction form
    919.62/1,379.61 = 270.27/x
  3. Step 3: Cross multiply
    919.62x = 1,379.61 × 270.27
  4. Step 4: Simplify right side
    919.62x = 372,867.19
  5. Step 5: Solve for x
    x = 372,867.19/919.62
  6. Step 6: Final answer
    x = 405.46

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Double scale
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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.