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Finding the Fourth Proportional to 609,205, 840,586.20 and 394,315.24

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Solution

The fourth proportional to 609,205, 840,586.20 and 394,315.24 is: 544,079.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,205 : 840,586.20 = 394,315.24 : x
  2. Step 2: Convert to fraction form
    609,205/840,586.20 = 394,315.24/x
  3. Step 3: Cross multiply
    609,205x = 840,586.20 × 394,315.24
  4. Step 4: Simplify right side
    609,205x = 331,455,949,193.69
  5. Step 5: Solve for x
    x = 331,455,949,193.69/609,205
  6. Step 6: Final answer
    x = 544,079.50

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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.