Home / 641,949.56-885,879.45-355,463.50

Finding the Fourth Proportional to 641,949.56, 885,879.45 and 355,463.50

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Solution

The fourth proportional to 641,949.56, 885,879.45 and 355,463.50 is: 490,533.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,949.56 : 885,879.45 = 355,463.50 : x
  2. Step 2: Convert to fraction form
    641,949.56/885,879.45 = 355,463.50/x
  3. Step 3: Cross multiply
    641,949.56x = 885,879.45 × 355,463.50
  4. Step 4: Simplify right side
    641,949.56x = 314,897,807,660.38
  5. Step 5: Solve for x
    x = 314,897,807,660.38/641,949.56
  6. Step 6: Final answer
    x = 490,533.57

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Half scale
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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.