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Finding the Fourth Proportional to 717,187.34, 989,725.83 and 394,927.36

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Solution

The fourth proportional to 717,187.34, 989,725.83 and 394,927.36 is: 545,003.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,187.34 : 989,725.83 = 394,927.36 : x
  2. Step 2: Convert to fraction form
    717,187.34/989,725.83 = 394,927.36/x
  3. Step 3: Cross multiply
    717,187.34x = 989,725.83 × 394,927.36
  4. Step 4: Simplify right side
    717,187.34x = 390,869,809,165.71
  5. Step 5: Solve for x
    x = 390,869,809,165.71/717,187.34
  6. Step 6: Final answer
    x = 545,003.78

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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.