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Finding the Fourth Proportional to 1,892.71, 2,611.98 and 1,107.21

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Solution

The fourth proportional to 1,892.71, 2,611.98 and 1,107.21 is: 1,527.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,892.71 : 2,611.98 = 1,107.21 : x
  2. Step 2: Convert to fraction form
    1,892.71/2,611.98 = 1,107.21/x
  3. Step 3: Cross multiply
    1,892.71x = 2,611.98 × 1,107.21
  4. Step 4: Simplify right side
    1,892.71x = 2,892,010.38
  5. Step 5: Solve for x
    x = 2,892,010.38/1,892.71
  6. Step 6: Final answer
    x = 1,527.97

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,893.71, 2,613.36 and 1,108.21
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.