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Finding the Fourth Proportional to 636,664.38, 878,721.65 and 364,914.41

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Solution

The fourth proportional to 636,664.38, 878,721.65 and 364,914.41 is: 503,653.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,664.38 : 878,721.65 = 364,914.41 : x
  2. Step 2: Convert to fraction form
    636,664.38/878,721.65 = 364,914.41/x
  3. Step 3: Cross multiply
    636,664.38x = 878,721.65 × 364,914.41
  4. Step 4: Simplify right side
    636,664.38x = 320,658,192,463.98
  5. Step 5: Solve for x
    x = 320,658,192,463.98/636,664.38
  6. Step 6: Final answer
    x = 503,653.42

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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.