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Finding the Fourth Proportional to 641,995.56, 885,963.78 and 351,601.77

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Solution

The fourth proportional to 641,995.56, 885,963.78 and 351,601.77 is: 485,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,995.56 : 885,963.78 = 351,601.77 : x
  2. Step 2: Convert to fraction form
    641,995.56/885,963.78 = 351,601.77/x
  3. Step 3: Cross multiply
    641,995.56x = 885,963.78 × 351,601.77
  4. Step 4: Simplify right side
    641,995.56x = 311,506,433,203.89
  5. Step 5: Solve for x
    x = 311,506,433,203.89/641,995.56
  6. Step 6: Final answer
    x = 485,215.87

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Double scale
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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.