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Finding the Fourth Proportional to 636,429.10, 878,053.62 and 394,624.66

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Solution

The fourth proportional to 636,429.10, 878,053.62 and 394,624.66 is: 544,446.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,429.10 : 878,053.62 = 394,624.66 : x
  2. Step 2: Convert to fraction form
    636,429.10/878,053.62 = 394,624.66/x
  3. Step 3: Cross multiply
    636,429.10x = 878,053.62 × 394,624.66
  4. Step 4: Simplify right side
    636,429.10x = 346,501,611,254.27
  5. Step 5: Solve for x
    x = 346,501,611,254.27/636,429.10
  6. Step 6: Final answer
    x = 544,446.52

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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.