Home / 641,961.45-885,895.89-355,475.38

Finding the Fourth Proportional to 641,961.45, 885,895.89 and 355,475.38

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Solution

The fourth proportional to 641,961.45, 885,895.89 and 355,475.38 is: 490,549.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,961.45 : 885,895.89 = 355,475.38 : x
  2. Step 2: Convert to fraction form
    641,961.45/885,895.89 = 355,475.38/x
  3. Step 3: Cross multiply
    641,961.45x = 885,895.89 × 355,475.38
  4. Step 4: Simplify right side
    641,961.45x = 314,914,178,138.19
  5. Step 5: Solve for x
    x = 314,914,178,138.19/641,961.45
  6. Step 6: Final answer
    x = 490,549.98

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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.