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Finding the Fourth Proportional to 644,030.60, 965,661.90 and 394,891.40

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Solution

The fourth proportional to 644,030.60, 965,661.90 and 394,891.40 is: 592,101.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,030.60 : 965,661.90 = 394,891.40 : x
  2. Step 2: Convert to fraction form
    644,030.60/965,661.90 = 394,891.40/x
  3. Step 3: Cross multiply
    644,030.60x = 965,661.90 × 394,891.40
  4. Step 4: Simplify right side
    644,030.60x = 381,331,579,617.66
  5. Step 5: Solve for x
    x = 381,331,579,617.66/644,030.60
  6. Step 6: Final answer
    x = 592,101.65

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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.