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Finding the Fourth Proportional to 717,143.36, 989,650.56 and 394,847.36

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Solution

The fourth proportional to 717,143.36, 989,650.56 and 394,847.36 is: 544,885.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,143.36 : 989,650.56 = 394,847.36 : x
  2. Step 2: Convert to fraction form
    717,143.36/989,650.56 = 394,847.36/x
  3. Step 3: Cross multiply
    717,143.36x = 989,650.56 × 394,847.36
  4. Step 4: Simplify right side
    717,143.36x = 390,760,910,938.52
  5. Step 5: Solve for x
    x = 390,760,910,938.52/717,143.36
  6. Step 6: Final answer
    x = 544,885.35

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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.