Home / 425,623.20-638,143.20-201,091.20

Finding the Fourth Proportional to 425,623.20, 638,143.20 and 201,091.20

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Solution

The fourth proportional to 425,623.20, 638,143.20 and 201,091.20 is: 301,499.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,623.20 : 638,143.20 = 201,091.20 : x
  2. Step 2: Convert to fraction form
    425,623.20/638,143.20 = 201,091.20/x
  3. Step 3: Cross multiply
    425,623.20x = 638,143.20 × 201,091.20
  4. Step 4: Simplify right side
    425,623.20x = 128,324,981,859.84
  5. Step 5: Solve for x
    x = 128,324,981,859.84/425,623.20
  6. Step 6: Final answer
    x = 301,499.03

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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.