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Finding the Fourth Proportional to 719,305.72, 992,571.18 and 396,995.04

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Solution

The fourth proportional to 719,305.72, 992,571.18 and 396,995.04 is: 547,814.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,305.72 : 992,571.18 = 396,995.04 : x
  2. Step 2: Convert to fraction form
    719,305.72/992,571.18 = 396,995.04/x
  3. Step 3: Cross multiply
    719,305.72x = 992,571.18 × 396,995.04
  4. Step 4: Simplify right side
    719,305.72x = 394,045,835,306.95
  5. Step 5: Solve for x
    x = 394,045,835,306.95/719,305.72
  6. Step 6: Final answer
    x = 547,814.13

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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.