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Finding the Fourth Proportional to 492,131.63, 679,148.55 and 274,334.11

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Solution

The fourth proportional to 492,131.63, 679,148.55 and 274,334.11 is: 378,584.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,131.63 : 679,148.55 = 274,334.11 : x
  2. Step 2: Convert to fraction form
    492,131.63/679,148.55 = 274,334.11/x
  3. Step 3: Cross multiply
    492,131.63x = 679,148.55 × 274,334.11
  4. Step 4: Simplify right side
    492,131.63x = 186,313,611,324.17
  5. Step 5: Solve for x
    x = 186,313,611,324.17/492,131.63
  6. Step 6: Final answer
    x = 378,584.91

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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.