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Finding the Fourth Proportional to 717,067.28, 989,534.76 and 394,774.16

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Solution

The fourth proportional to 717,067.28, 989,534.76 and 394,774.16 is: 544,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,067.28 : 989,534.76 = 394,774.16 : x
  2. Step 2: Convert to fraction form
    717,067.28/989,534.76 = 394,774.16/x
  3. Step 3: Cross multiply
    717,067.28x = 989,534.76 × 394,774.16
  4. Step 4: Simplify right side
    717,067.28x = 390,642,753,669.80
  5. Step 5: Solve for x
    x = 390,642,753,669.80/717,067.28
  6. Step 6: Final answer
    x = 544,778.38

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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.