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Finding the Fourth Proportional to 262,287.60, 393,431.40 and 84,921.90

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Solution

The fourth proportional to 262,287.60, 393,431.40 and 84,921.90 is: 127,382.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,287.60 : 393,431.40 = 84,921.90 : x
  2. Step 2: Convert to fraction form
    262,287.60/393,431.40 = 84,921.90/x
  3. Step 3: Cross multiply
    262,287.60x = 393,431.40 × 84,921.90
  4. Step 4: Simplify right side
    262,287.60x = 33,410,942,007.66
  5. Step 5: Solve for x
    x = 33,410,942,007.66/262,287.60
  6. Step 6: Final answer
    x = 127,382.85

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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.