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Finding the Fourth Proportional to 717,069.28, 989,537.52 and 394,776.16

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Solution

The fourth proportional to 717,069.28, 989,537.52 and 394,776.16 is: 544,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,069.28 : 989,537.52 = 394,776.16 : x
  2. Step 2: Convert to fraction form
    717,069.28/989,537.52 = 394,776.16/x
  3. Step 3: Cross multiply
    717,069.28x = 989,537.52 × 394,776.16
  4. Step 4: Simplify right side
    717,069.28x = 390,645,822,321.52
  5. Step 5: Solve for x
    x = 390,645,822,321.52/717,069.28
  6. Step 6: Final answer
    x = 544,781.14

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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.