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Finding the Fourth Proportional to 680,489.96, 939,015 and 394,029.32

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Solution

The fourth proportional to 680,489.96, 939,015 and 394,029.32 is: 543,725.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,489.96 : 939,015 = 394,029.32 : x
  2. Step 2: Convert to fraction form
    680,489.96/939,015 = 394,029.32/x
  3. Step 3: Cross multiply
    680,489.96x = 939,015 × 394,029.32
  4. Step 4: Simplify right side
    680,489.96x = 369,999,441,919.80
  5. Step 5: Solve for x
    x = 369,999,441,919.80/680,489.96
  6. Step 6: Final answer
    x = 543,725.06

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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.