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Finding the Fourth Proportional to 489,396.57, 675,398.30 and 274,550.55

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Solution

The fourth proportional to 489,396.57, 675,398.30 and 274,550.55 is: 378,897.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,396.57 : 675,398.30 = 274,550.55 : x
  2. Step 2: Convert to fraction form
    489,396.57/675,398.30 = 274,550.55/x
  3. Step 3: Cross multiply
    489,396.57x = 675,398.30 × 274,550.55
  4. Step 4: Simplify right side
    489,396.57x = 185,430,973,361.31
  5. Step 5: Solve for x
    x = 185,430,973,361.31/489,396.57
  6. Step 6: Final answer
    x = 378,897.17

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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.