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Finding the Fourth Proportional to 636,437.96, 878,315.94 and 394,798.38

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Solution

The fourth proportional to 636,437.96, 878,315.94 and 394,798.38 is: 544,841.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,437.96 : 878,315.94 = 394,798.38 : x
  2. Step 2: Convert to fraction form
    636,437.96/878,315.94 = 394,798.38/x
  3. Step 3: Cross multiply
    636,437.96x = 878,315.94 × 394,798.38
  4. Step 4: Simplify right side
    636,437.96x = 346,757,710,240.18
  5. Step 5: Solve for x
    x = 346,757,710,240.18/636,437.96
  6. Step 6: Final answer
    x = 544,841.34

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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.