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Finding the Fourth Proportional to 2,415.52, 3,619.02 and 2,115.69

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Solution

The fourth proportional to 2,415.52, 3,619.02 and 2,115.69 is: 3,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,415.52 : 3,619.02 = 2,115.69 : x
  2. Step 2: Convert to fraction form
    2,415.52/3,619.02 = 2,115.69/x
  3. Step 3: Cross multiply
    2,415.52x = 3,619.02 × 2,115.69
  4. Step 4: Simplify right side
    2,415.52x = 7,656,712.84
  5. Step 5: Solve for x
    x = 7,656,712.84/2,415.52
  6. Step 6: Final answer
    x = 3,169.80

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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.