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Finding the Fourth Proportional to 3,216.14, 4,824.38 and 907.82

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Solution

The fourth proportional to 3,216.14, 4,824.38 and 907.82 is: 1,361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216.14 : 4,824.38 = 907.82 : x
  2. Step 2: Convert to fraction form
    3,216.14/4,824.38 = 907.82/x
  3. Step 3: Cross multiply
    3,216.14x = 4,824.38 × 907.82
  4. Step 4: Simplify right side
    3,216.14x = 4,379,664.11
  5. Step 5: Solve for x
    x = 4,379,664.11/3,216.14
  6. Step 6: Final answer
    x = 1,361.78

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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.