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Finding the Fourth Proportional to 720,886.60, 994,844.46 and 394,218.82

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Solution

The fourth proportional to 720,886.60, 994,844.46 and 394,218.82 is: 544,033.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,886.60 : 994,844.46 = 394,218.82 : x
  2. Step 2: Convert to fraction form
    720,886.60/994,844.46 = 394,218.82/x
  3. Step 3: Cross multiply
    720,886.60x = 994,844.46 × 394,218.82
  4. Step 4: Simplify right side
    720,886.60x = 392,186,409,104.74
  5. Step 5: Solve for x
    x = 392,186,409,104.74/720,886.60
  6. Step 6: Final answer
    x = 544,033.43

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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.