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Finding the Fourth Proportional to 1,611.99, 2,415.15 and 1,149.08

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Solution

The fourth proportional to 1,611.99, 2,415.15 and 1,149.08 is: 1,721.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.99 : 2,415.15 = 1,149.08 : x
  2. Step 2: Convert to fraction form
    1,611.99/2,415.15 = 1,149.08/x
  3. Step 3: Cross multiply
    1,611.99x = 2,415.15 × 1,149.08
  4. Step 4: Simplify right side
    1,611.99x = 2,775,188.49
  5. Step 5: Solve for x
    x = 2,775,188.49/1,611.99
  6. Step 6: Final answer
    x = 1,721.59

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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.