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Finding the Fourth Proportional to 636,279.86, 878,069.22 and 349,818.50

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Solution

The fourth proportional to 636,279.86, 878,069.22 and 349,818.50 is: 482,751.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,279.86 : 878,069.22 = 349,818.50 : x
  2. Step 2: Convert to fraction form
    636,279.86/878,069.22 = 349,818.50/x
  3. Step 3: Cross multiply
    636,279.86x = 878,069.22 × 349,818.50
  4. Step 4: Simplify right side
    636,279.86x = 307,164,857,436.57
  5. Step 5: Solve for x
    x = 307,164,857,436.57/636,279.86
  6. Step 6: Final answer
    x = 482,751.19

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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.