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Finding the Fourth Proportional to 717,067.20, 989,515.18 and 394,714.34

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Solution

The fourth proportional to 717,067.20, 989,515.18 and 394,714.34 is: 544,685.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,067.20 : 989,515.18 = 394,714.34 : x
  2. Step 2: Convert to fraction form
    717,067.20/989,515.18 = 394,714.34/x
  3. Step 3: Cross multiply
    717,067.20x = 989,515.18 × 394,714.34
  4. Step 4: Simplify right side
    717,067.20x = 390,575,831,193.68
  5. Step 5: Solve for x
    x = 390,575,831,193.68/717,067.20
  6. Step 6: Final answer
    x = 544,685.12

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Double scale
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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.