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Finding the Fourth Proportional to 493,991.39, 681,690.66 and 279,126.84

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Solution

The fourth proportional to 493,991.39, 681,690.66 and 279,126.84 is: 385,185.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,991.39 : 681,690.66 = 279,126.84 : x
  2. Step 2: Convert to fraction form
    493,991.39/681,690.66 = 279,126.84/x
  3. Step 3: Cross multiply
    493,991.39x = 681,690.66 × 279,126.84
  4. Step 4: Simplify right side
    493,991.39x = 190,278,159,783.31
  5. Step 5: Solve for x
    x = 190,278,159,783.31/493,991.39
  6. Step 6: Final answer
    x = 385,185.17

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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.