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Finding the Fourth Proportional to 414,540.80, 621,811.20 and 134,086.40

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Solution

The fourth proportional to 414,540.80, 621,811.20 and 134,086.40 is: 201,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,540.80 : 621,811.20 = 134,086.40 : x
  2. Step 2: Convert to fraction form
    414,540.80/621,811.20 = 134,086.40/x
  3. Step 3: Cross multiply
    414,540.80x = 621,811.20 × 134,086.40
  4. Step 4: Simplify right side
    414,540.80x = 83,376,425,287.68
  5. Step 5: Solve for x
    x = 83,376,425,287.68/414,540.80
  6. Step 6: Final answer
    x = 201,129.60

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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.