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Finding the Fourth Proportional to 1,611.12, 2,415.03 and 1,091.17

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Solution

The fourth proportional to 1,611.12, 2,415.03 and 1,091.17 is: 1,635.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.12 : 2,415.03 = 1,091.17 : x
  2. Step 2: Convert to fraction form
    1,611.12/2,415.03 = 1,091.17/x
  3. Step 3: Cross multiply
    1,611.12x = 2,415.03 × 1,091.17
  4. Step 4: Simplify right side
    1,611.12x = 2,635,208.29
  5. Step 5: Solve for x
    x = 2,635,208.29/1,611.12
  6. Step 6: Final answer
    x = 1,635.64

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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.