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Finding the Fourth Proportional to 636,435.22, 878,312.16 and 394,795.63

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Solution

The fourth proportional to 636,435.22, 878,312.16 and 394,795.63 is: 544,837.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,435.22 : 878,312.16 = 394,795.63 : x
  2. Step 2: Convert to fraction form
    636,435.22/878,312.16 = 394,795.63/x
  3. Step 3: Cross multiply
    636,435.22x = 878,312.16 × 394,795.63
  4. Step 4: Simplify right side
    636,435.22x = 346,753,802,543.86
  5. Step 5: Solve for x
    x = 346,753,802,543.86/636,435.22
  6. Step 6: Final answer
    x = 544,837.54

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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.