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Finding the Fourth Proportional to 425,979.40, 638,426.40 and 226,395.40

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Solution

The fourth proportional to 425,979.40, 638,426.40 and 226,395.40 is: 339,304.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,979.40 : 638,426.40 = 226,395.40 : x
  2. Step 2: Convert to fraction form
    425,979.40/638,426.40 = 226,395.40/x
  3. Step 3: Cross multiply
    425,979.40x = 638,426.40 × 226,395.40
  4. Step 4: Simplify right side
    425,979.40x = 144,536,800,198.56
  5. Step 5: Solve for x
    x = 144,536,800,198.56/425,979.40
  6. Step 6: Final answer
    x = 339,304.67

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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.