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Finding the Fourth Proportional to 642,208.30, 886,209.39 and 351,761.94

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Solution

The fourth proportional to 642,208.30, 886,209.39 and 351,761.94 is: 485,410.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,208.30 : 886,209.39 = 351,761.94 : x
  2. Step 2: Convert to fraction form
    642,208.30/886,209.39 = 351,761.94/x
  3. Step 3: Cross multiply
    642,208.30x = 886,209.39 × 351,761.94
  4. Step 4: Simplify right side
    642,208.30x = 311,734,734,272.62
  5. Step 5: Solve for x
    x = 311,734,734,272.62/642,208.30
  6. Step 6: Final answer
    x = 485,410.63

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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.