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Finding the Fourth Proportional to 609,469, 840,788.10 and 394,678.24

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Solution

The fourth proportional to 609,469, 840,788.10 and 394,678.24 is: 544,475.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,469 : 840,788.10 = 394,678.24 : x
  2. Step 2: Convert to fraction form
    609,469/840,788.10 = 394,678.24/x
  3. Step 3: Cross multiply
    609,469x = 840,788.10 × 394,678.24
  4. Step 4: Simplify right side
    609,469x = 331,840,767,520.94
  5. Step 5: Solve for x
    x = 331,840,767,520.94/609,469
  6. Step 6: Final answer
    x = 544,475.22

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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.