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Finding the Fourth Proportional to 425,805.40, 638,165.40 and 226,221.40

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Solution

The fourth proportional to 425,805.40, 638,165.40 and 226,221.40 is: 339,043.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,805.40 : 638,165.40 = 226,221.40 : x
  2. Step 2: Convert to fraction form
    425,805.40/638,165.40 = 226,221.40/x
  3. Step 3: Cross multiply
    425,805.40x = 638,165.40 × 226,221.40
  4. Step 4: Simplify right side
    425,805.40x = 144,366,670,219.56
  5. Step 5: Solve for x
    x = 144,366,670,219.56/425,805.40
  6. Step 6: Final answer
    x = 339,043.77

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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.