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Finding the Fourth Proportional to 636,360.55, 878,194.19 and 345,991.65

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Solution

The fourth proportional to 636,360.55, 878,194.19 and 345,991.65 is: 477,477.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,360.55 : 878,194.19 = 345,991.65 : x
  2. Step 2: Convert to fraction form
    636,360.55/878,194.19 = 345,991.65/x
  3. Step 3: Cross multiply
    636,360.55x = 878,194.19 × 345,991.65
  4. Step 4: Simplify right side
    636,360.55x = 303,847,850,697.58
  5. Step 5: Solve for x
    x = 303,847,850,697.58/636,360.55
  6. Step 6: Final answer
    x = 477,477.51

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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.