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Finding the Fourth Proportional to 717,199.31, 989,735.05 and 394,908.64

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Solution

The fourth proportional to 717,199.31, 989,735.05 and 394,908.64 is: 544,973.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,199.31 : 989,735.05 = 394,908.64 : x
  2. Step 2: Convert to fraction form
    717,199.31/989,735.05 = 394,908.64/x
  3. Step 3: Cross multiply
    717,199.31x = 989,735.05 × 394,908.64
  4. Step 4: Simplify right side
    717,199.31x = 390,854,923,358.76
  5. Step 5: Solve for x
    x = 390,854,923,358.76/717,199.31
  6. Step 6: Final answer
    x = 544,973.92

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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.