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Finding the Fourth Proportional to 717,200.17, 989,758.01 and 394,921.80

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Solution

The fourth proportional to 717,200.17, 989,758.01 and 394,921.80 is: 545,004.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,200.17 : 989,758.01 = 394,921.80 : x
  2. Step 2: Convert to fraction form
    717,200.17/989,758.01 = 394,921.80/x
  3. Step 3: Cross multiply
    717,200.17x = 989,758.01 × 394,921.80
  4. Step 4: Simplify right side
    717,200.17x = 390,877,014,873.62
  5. Step 5: Solve for x
    x = 390,877,014,873.62/717,200.17
  6. Step 6: Final answer
    x = 545,004.07

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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.