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Finding the Fourth Proportional to 641,337.92, 885,009.36 and 354,840.92

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Solution

The fourth proportional to 641,337.92, 885,009.36 and 354,840.92 is: 489,660.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,337.92 : 885,009.36 = 354,840.92 : x
  2. Step 2: Convert to fraction form
    641,337.92/885,009.36 = 354,840.92/x
  3. Step 3: Cross multiply
    641,337.92x = 885,009.36 × 354,840.92
  4. Step 4: Simplify right side
    641,337.92x = 314,037,535,511.01
  5. Step 5: Solve for x
    x = 314,037,535,511.01/641,337.92
  6. Step 6: Final answer
    x = 489,660.01

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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.