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Finding the Fourth Proportional to 719,257.81, 992,570.88 and 396,967.91

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Solution

The fourth proportional to 719,257.81, 992,570.88 and 396,967.91 is: 547,813.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,257.81 : 992,570.88 = 396,967.91 : x
  2. Step 2: Convert to fraction form
    719,257.81/992,570.88 = 396,967.91/x
  3. Step 3: Cross multiply
    719,257.81x = 992,570.88 × 396,967.91
  4. Step 4: Simplify right side
    719,257.81x = 394,018,785,279.03
  5. Step 5: Solve for x
    x = 394,018,785,279.03/719,257.81
  6. Step 6: Final answer
    x = 547,813.01

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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.