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Finding the Fourth Proportional to 680,462.88, 938,977.68 and 394,002.36

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Solution

The fourth proportional to 680,462.88, 938,977.68 and 394,002.36 is: 543,687.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,462.88 : 938,977.68 = 394,002.36 : x
  2. Step 2: Convert to fraction form
    680,462.88/938,977.68 = 394,002.36/x
  3. Step 3: Cross multiply
    680,462.88x = 938,977.68 × 394,002.36
  4. Step 4: Simplify right side
    680,462.88x = 369,959,421,907.33
  5. Step 5: Solve for x
    x = 369,959,421,907.33/680,462.88
  6. Step 6: Final answer
    x = 543,687.88

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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.