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Finding the Fourth Proportional to 2,611.98, 3,918.17 and 664.18

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Solution

The fourth proportional to 2,611.98, 3,918.17 and 664.18 is: 996.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.98 : 3,918.17 = 664.18 : x
  2. Step 2: Convert to fraction form
    2,611.98/3,918.17 = 664.18/x
  3. Step 3: Cross multiply
    2,611.98x = 3,918.17 × 664.18
  4. Step 4: Simplify right side
    2,611.98x = 2,602,362.02
  5. Step 5: Solve for x
    x = 2,602,362.02/2,611.98
  6. Step 6: Final answer
    x = 996.32

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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.