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Finding the Fourth Proportional to 527,640.48, 728,144.48 and 285,920.94

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Solution

The fourth proportional to 527,640.48, 728,144.48 and 285,920.94 is: 394,571.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    527,640.48 : 728,144.48 = 285,920.94 : x
  2. Step 2: Convert to fraction form
    527,640.48/728,144.48 = 285,920.94/x
  3. Step 3: Cross multiply
    527,640.48x = 728,144.48 × 285,920.94
  4. Step 4: Simplify right side
    527,640.48x = 208,191,756,712.58
  5. Step 5: Solve for x
    x = 208,191,756,712.58/527,640.48
  6. Step 6: Final answer
    x = 394,571.23

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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.