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Finding the Fourth Proportional to 641,744.22, 885,328.95 and 386,953.86

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Solution

The fourth proportional to 641,744.22, 885,328.95 and 386,953.86 is: 533,828.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,744.22 : 885,328.95 = 386,953.86 : x
  2. Step 2: Convert to fraction form
    641,744.22/885,328.95 = 386,953.86/x
  3. Step 3: Cross multiply
    641,744.22x = 885,328.95 × 386,953.86
  4. Step 4: Simplify right side
    641,744.22x = 342,581,454,572.25
  5. Step 5: Solve for x
    x = 342,581,454,572.25/641,744.22
  6. Step 6: Final answer
    x = 533,828.66

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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.