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Finding the Fourth Proportional to 641,740.72, 885,324.20 and 386,950.36

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Solution

The fourth proportional to 641,740.72, 885,324.20 and 386,950.36 is: 533,823.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,740.72 : 885,324.20 = 386,950.36 : x
  2. Step 2: Convert to fraction form
    641,740.72/885,324.20 = 386,950.36/x
  3. Step 3: Cross multiply
    641,740.72x = 885,324.20 × 386,950.36
  4. Step 4: Simplify right side
    641,740.72x = 342,576,517,906.71
  5. Step 5: Solve for x
    x = 342,576,517,906.71/641,740.72
  6. Step 6: Final answer
    x = 533,823.88

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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.