Home / 641,786.20-885,665.17-351,416.17

Finding the Fourth Proportional to 641,786.20, 885,665.17 and 351,416.17

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Solution

The fourth proportional to 641,786.20, 885,665.17 and 351,416.17 is: 484,954.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,786.20 : 885,665.17 = 351,416.17 : x
  2. Step 2: Convert to fraction form
    641,786.20/885,665.17 = 351,416.17/x
  3. Step 3: Cross multiply
    641,786.20x = 885,665.17 × 351,416.17
  4. Step 4: Simplify right side
    641,786.20x = 311,237,058,271.21
  5. Step 5: Solve for x
    x = 311,237,058,271.21/641,786.20
  6. Step 6: Final answer
    x = 484,954.42

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.