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Finding the Fourth Proportional to 641,421.43, 885,101.49 and 383,246.98

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Solution

The fourth proportional to 641,421.43, 885,101.49 and 383,246.98 is: 528,844.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,421.43 : 885,101.49 = 383,246.98 : x
  2. Step 2: Convert to fraction form
    641,421.43/885,101.49 = 383,246.98/x
  3. Step 3: Cross multiply
    641,421.43x = 885,101.49 × 383,246.98
  4. Step 4: Simplify right side
    641,421.43x = 339,212,470,823.25
  5. Step 5: Solve for x
    x = 339,212,470,823.25/641,421.43
  6. Step 6: Final answer
    x = 528,844.93

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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.