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Finding the Fourth Proportional to 641,960.45, 885,894.51 and 355,474.38

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Solution

The fourth proportional to 641,960.45, 885,894.51 and 355,474.38 is: 490,548.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,960.45 : 885,894.51 = 355,474.38 : x
  2. Step 2: Convert to fraction form
    641,960.45/885,894.51 = 355,474.38/x
  3. Step 3: Cross multiply
    641,960.45x = 885,894.51 × 355,474.38
  4. Step 4: Simplify right side
    641,960.45x = 314,912,801,687.65
  5. Step 5: Solve for x
    x = 314,912,801,687.65/641,960.45
  6. Step 6: Final answer
    x = 490,548.61

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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.