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Finding the Fourth Proportional to 262,431.60, 393,685.80 and 84,908.40

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Solution

The fourth proportional to 262,431.60, 393,685.80 and 84,908.40 is: 127,375.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,431.60 : 393,685.80 = 84,908.40 : x
  2. Step 2: Convert to fraction form
    262,431.60/393,685.80 = 84,908.40/x
  3. Step 3: Cross multiply
    262,431.60x = 393,685.80 × 84,908.40
  4. Step 4: Simplify right side
    262,431.60x = 33,427,231,380.72
  5. Step 5: Solve for x
    x = 33,427,231,380.72/262,431.60
  6. Step 6: Final answer
    x = 127,375.02

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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.