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Finding the Fourth Proportional to 2,688.66, 4,028.28 and 1,867.46

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Solution

The fourth proportional to 2,688.66, 4,028.28 and 1,867.46 is: 2,797.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.66 : 4,028.28 = 1,867.46 : x
  2. Step 2: Convert to fraction form
    2,688.66/4,028.28 = 1,867.46/x
  3. Step 3: Cross multiply
    2,688.66x = 4,028.28 × 1,867.46
  4. Step 4: Simplify right side
    2,688.66x = 7,522,631.63
  5. Step 5: Solve for x
    x = 7,522,631.63/2,688.66
  6. Step 6: Final answer
    x = 2,797.91

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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.