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Finding the Fourth Proportional to 2,635.84, 3,954.03 and 856.46

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Solution

The fourth proportional to 2,635.84, 3,954.03 and 856.46 is: 1,284.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,635.84 : 3,954.03 = 856.46 : x
  2. Step 2: Convert to fraction form
    2,635.84/3,954.03 = 856.46/x
  3. Step 3: Cross multiply
    2,635.84x = 3,954.03 × 856.46
  4. Step 4: Simplify right side
    2,635.84x = 3,386,468.53
  5. Step 5: Solve for x
    x = 3,386,468.53/2,635.84
  6. Step 6: Final answer
    x = 1,284.78

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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.