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Finding the Fourth Proportional to 2,611.17, 3,916.74 and 881.01

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Solution

The fourth proportional to 2,611.17, 3,916.74 and 881.01 is: 1,321.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.17 : 3,916.74 = 881.01 : x
  2. Step 2: Convert to fraction form
    2,611.17/3,916.74 = 881.01/x
  3. Step 3: Cross multiply
    2,611.17x = 3,916.74 × 881.01
  4. Step 4: Simplify right side
    2,611.17x = 3,450,687.11
  5. Step 5: Solve for x
    x = 3,450,687.11/2,611.17
  6. Step 6: Final answer
    x = 1,321.51

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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.