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Finding the Fourth Proportional to 262,643.20, 393,705.60 and 129,414.40

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Solution

The fourth proportional to 262,643.20, 393,705.60 and 129,414.40 is: 193,993.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,643.20 : 393,705.60 = 129,414.40 : x
  2. Step 2: Convert to fraction form
    262,643.20/393,705.60 = 129,414.40/x
  3. Step 3: Cross multiply
    262,643.20x = 393,705.60 × 129,414.40
  4. Step 4: Simplify right side
    262,643.20x = 50,951,174,000.64
  5. Step 5: Solve for x
    x = 50,951,174,000.64/262,643.20
  6. Step 6: Final answer
    x = 193,993.88

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1.5x scale

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.