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Finding the Fourth Proportional to 426,052.49, 638,969.11 and 126,462.11

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Solution

The fourth proportional to 426,052.49, 638,969.11 and 126,462.11 is: 189,660.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,052.49 : 638,969.11 = 126,462.11 : x
  2. Step 2: Convert to fraction form
    426,052.49/638,969.11 = 126,462.11/x
  3. Step 3: Cross multiply
    426,052.49x = 638,969.11 × 126,462.11
  4. Step 4: Simplify right side
    426,052.49x = 80,805,378,364.42
  5. Step 5: Solve for x
    x = 80,805,378,364.42/426,052.49
  6. Step 6: Final answer
    x = 189,660.62

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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.