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Finding the Fourth Proportional to 2,188.62, 3,282.93 and 890.09

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Solution

The fourth proportional to 2,188.62, 3,282.93 and 890.09 is: 1,335.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.62 : 3,282.93 = 890.09 : x
  2. Step 2: Convert to fraction form
    2,188.62/3,282.93 = 890.09/x
  3. Step 3: Cross multiply
    2,188.62x = 3,282.93 × 890.09
  4. Step 4: Simplify right side
    2,188.62x = 2,922,114.71
  5. Step 5: Solve for x
    x = 2,922,114.71/2,188.62
  6. Step 6: Final answer
    x = 1,335.14

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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.