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Finding the Fourth Proportional to 425,105, 637,694.74 and 109,561.40

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Solution

The fourth proportional to 425,105, 637,694.74 and 109,561.40 is: 164,351.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,105 : 637,694.74 = 109,561.40 : x
  2. Step 2: Convert to fraction form
    425,105/637,694.74 = 109,561.40/x
  3. Step 3: Cross multiply
    425,105x = 637,694.74 × 109,561.40
  4. Step 4: Simplify right side
    425,105x = 69,866,728,487.04
  5. Step 5: Solve for x
    x = 69,866,728,487.04/425,105
  6. Step 6: Final answer
    x = 164,351.70

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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.