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Finding the Fourth Proportional to 625,320.90, 937,981.72 and 439,163.46

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Solution

The fourth proportional to 625,320.90, 937,981.72 and 439,163.46 is: 658,745.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,320.90 : 937,981.72 = 439,163.46 : x
  2. Step 2: Convert to fraction form
    625,320.90/937,981.72 = 439,163.46/x
  3. Step 3: Cross multiply
    625,320.90x = 937,981.72 × 439,163.46
  4. Step 4: Simplify right side
    625,320.90x = 411,927,297,571.95
  5. Step 5: Solve for x
    x = 411,927,297,571.95/625,320.90
  6. Step 6: Final answer
    x = 658,745.45

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1.5x scale

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.