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Finding the Fourth Proportional to 636,441.70, 878,321.12 and 394,802.14

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Solution

The fourth proportional to 636,441.70, 878,321.12 and 394,802.14 is: 544,846.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,441.70 : 878,321.12 = 394,802.14 : x
  2. Step 2: Convert to fraction form
    636,441.70/878,321.12 = 394,802.14/x
  3. Step 3: Cross multiply
    636,441.70x = 878,321.12 × 394,802.14
  4. Step 4: Simplify right side
    636,441.70x = 346,763,057,783.20
  5. Step 5: Solve for x
    x = 346,763,057,783.20/636,441.70
  6. Step 6: Final answer
    x = 544,846.54

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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.