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Finding the Fourth Proportional to 680,488.96, 939,013.62 and 394,028.32

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Solution

The fourth proportional to 680,488.96, 939,013.62 and 394,028.32 is: 543,723.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,488.96 : 939,013.62 = 394,028.32 : x
  2. Step 2: Convert to fraction form
    680,488.96/939,013.62 = 394,028.32/x
  3. Step 3: Cross multiply
    680,488.96x = 939,013.62 × 394,028.32
  4. Step 4: Simplify right side
    680,488.96x = 369,997,959,145.72
  5. Step 5: Solve for x
    x = 369,997,959,145.72/680,488.96
  6. Step 6: Final answer
    x = 543,723.68

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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.