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Finding the Fourth Proportional to 719,453.59, 992,819.93 and 397,156.77

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Solution

The fourth proportional to 719,453.59, 992,819.93 and 397,156.77 is: 548,061.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,453.59 : 992,819.93 = 397,156.77 : x
  2. Step 2: Convert to fraction form
    719,453.59/992,819.93 = 397,156.77/x
  3. Step 3: Cross multiply
    719,453.59x = 992,819.93 × 397,156.77
  4. Step 4: Simplify right side
    719,453.59x = 394,305,154,604.91
  5. Step 5: Solve for x
    x = 394,305,154,604.91/719,453.59
  6. Step 6: Final answer
    x = 548,061.97

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Half scale
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Double scale
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Similar ratio
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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.