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Finding the Fourth Proportional to 490,442.87, 676,871.61 and 275,578.25

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Solution

The fourth proportional to 490,442.87, 676,871.61 and 275,578.25 is: 380,331.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,442.87 : 676,871.61 = 275,578.25 : x
  2. Step 2: Convert to fraction form
    490,442.87/676,871.61 = 275,578.25/x
  3. Step 3: Cross multiply
    490,442.87x = 676,871.61 × 275,578.25
  4. Step 4: Simplify right side
    490,442.87x = 186,531,093,758.48
  5. Step 5: Solve for x
    x = 186,531,093,758.48/490,442.87
  6. Step 6: Final answer
    x = 380,331.95

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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.