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Finding the Fourth Proportional to 644,806.40, 965,366.40 and 578,451.20

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Solution

The fourth proportional to 644,806.40, 965,366.40 and 578,451.20 is: 866,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,806.40 : 965,366.40 = 578,451.20 : x
  2. Step 2: Convert to fraction form
    644,806.40/965,366.40 = 578,451.20/x
  3. Step 3: Cross multiply
    644,806.40x = 965,366.40 × 578,451.20
  4. Step 4: Simplify right side
    644,806.40x = 558,417,352,519.68
  5. Step 5: Solve for x
    x = 558,417,352,519.68/644,806.40
  6. Step 6: Final answer
    x = 866,023.28

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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.