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Finding the Fourth Proportional to 2,190.88, 3,286.56 and 730.16

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Solution

The fourth proportional to 2,190.88, 3,286.56 and 730.16 is: 1,095.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.88 : 3,286.56 = 730.16 : x
  2. Step 2: Convert to fraction form
    2,190.88/3,286.56 = 730.16/x
  3. Step 3: Cross multiply
    2,190.88x = 3,286.56 × 730.16
  4. Step 4: Simplify right side
    2,190.88x = 2,399,714.65
  5. Step 5: Solve for x
    x = 2,399,714.65/2,190.88
  6. Step 6: Final answer
    x = 1,095.32

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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.