Home / 1,639.62-2,263.05-1,115.82

Finding the Fourth Proportional to 1,639.62, 2,263.05 and 1,115.82

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Solution

The fourth proportional to 1,639.62, 2,263.05 and 1,115.82 is: 1,540.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.62 : 2,263.05 = 1,115.82 : x
  2. Step 2: Convert to fraction form
    1,639.62/2,263.05 = 1,115.82/x
  3. Step 3: Cross multiply
    1,639.62x = 2,263.05 × 1,115.82
  4. Step 4: Simplify right side
    1,639.62x = 2,525,156.45
  5. Step 5: Solve for x
    x = 2,525,156.45/1,639.62
  6. Step 6: Final answer
    x = 1,540.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.