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Finding the Fourth Proportional to 489,184.80, 675,107.28 and 274,338.72

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Solution

The fourth proportional to 489,184.80, 675,107.28 and 274,338.72 is: 378,605.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,184.80 : 675,107.28 = 274,338.72 : x
  2. Step 2: Convert to fraction form
    489,184.80/675,107.28 = 274,338.72/x
  3. Step 3: Cross multiply
    489,184.80x = 675,107.28 × 274,338.72
  4. Step 4: Simplify right side
    489,184.80x = 185,208,067,057.88
  5. Step 5: Solve for x
    x = 185,208,067,057.88/489,184.80
  6. Step 6: Final answer
    x = 378,605.52

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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.