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Finding the Fourth Proportional to 1,611.69, 2,417.31 and 516.15

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Solution

The fourth proportional to 1,611.69, 2,417.31 and 516.15 is: 774.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.69 : 2,417.31 = 516.15 : x
  2. Step 2: Convert to fraction form
    1,611.69/2,417.31 = 516.15/x
  3. Step 3: Cross multiply
    1,611.69x = 2,417.31 × 516.15
  4. Step 4: Simplify right side
    1,611.69x = 1,247,694.56
  5. Step 5: Solve for x
    x = 1,247,694.56/1,611.69
  6. Step 6: Final answer
    x = 774.15

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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.