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Finding the Fourth Proportional to 425,640.20, 638,168.70 and 201,108.20

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Solution

The fourth proportional to 425,640.20, 638,168.70 and 201,108.20 is: 301,524.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,640.20 : 638,168.70 = 201,108.20 : x
  2. Step 2: Convert to fraction form
    425,640.20/638,168.70 = 201,108.20/x
  3. Step 3: Cross multiply
    425,640.20x = 638,168.70 × 201,108.20
  4. Step 4: Simplify right side
    425,640.20x = 128,340,958,553.34
  5. Step 5: Solve for x
    x = 128,340,958,553.34/425,640.20
  6. Step 6: Final answer
    x = 301,524.52

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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.