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Finding the Fourth Proportional to 494,012.82, 681,728.80 and 279,148.24

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Solution

The fourth proportional to 494,012.82, 681,728.80 and 279,148.24 is: 385,219.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    494,012.82 : 681,728.80 = 279,148.24 : x
  2. Step 2: Convert to fraction form
    494,012.82/681,728.80 = 279,148.24/x
  3. Step 3: Cross multiply
    494,012.82x = 681,728.80 × 279,148.24
  4. Step 4: Simplify right side
    494,012.82x = 190,303,394,677.31
  5. Step 5: Solve for x
    x = 190,303,394,677.31/494,012.82
  6. Step 6: Final answer
    x = 385,219.55

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1.5x scale

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.