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Finding the Fourth Proportional to 519,221.14, 716,525.83 and 289,778.41

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Solution

The fourth proportional to 519,221.14, 716,525.83 and 289,778.41 is: 399,894.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,221.14 : 716,525.83 = 289,778.41 : x
  2. Step 2: Convert to fraction form
    519,221.14/716,525.83 = 289,778.41/x
  3. Step 3: Cross multiply
    519,221.14x = 716,525.83 × 289,778.41
  4. Step 4: Simplify right side
    519,221.14x = 207,633,716,999.21
  5. Step 5: Solve for x
    x = 207,633,716,999.21/519,221.14
  6. Step 6: Final answer
    x = 399,894.58

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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.