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Finding the Fourth Proportional to 720,710.88, 994,584.17 and 394,030.80

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Solution

The fourth proportional to 720,710.88, 994,584.17 and 394,030.80 is: 543,764.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,710.88 : 994,584.17 = 394,030.80 : x
  2. Step 2: Convert to fraction form
    720,710.88/994,584.17 = 394,030.80/x
  3. Step 3: Cross multiply
    720,710.88x = 994,584.17 × 394,030.80
  4. Step 4: Simplify right side
    720,710.88x = 391,896,794,202.28
  5. Step 5: Solve for x
    x = 391,896,794,202.28/720,710.88
  6. Step 6: Final answer
    x = 543,764.23

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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.