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Finding the Fourth Proportional to 644,111.60, 965,783.40 and 394,972.40

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Solution

The fourth proportional to 644,111.60, 965,783.40 and 394,972.40 is: 592,223.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,111.60 : 965,783.40 = 394,972.40 : x
  2. Step 2: Convert to fraction form
    644,111.60/965,783.40 = 394,972.40/x
  3. Step 3: Cross multiply
    644,111.60x = 965,783.40 × 394,972.40
  4. Step 4: Simplify right side
    644,111.60x = 381,457,787,378.16
  5. Step 5: Solve for x
    x = 381,457,787,378.16/644,111.60
  6. Step 6: Final answer
    x = 592,223.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.