Home / 728,015.60-1,092,671.40-428,121.20

Finding the Fourth Proportional to 728,015.60, 1,092,671.40 and 428,121.20

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Solution

The fourth proportional to 728,015.60, 1,092,671.40 and 428,121.20 is: 642,562.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,015.60 : 1,092,671.40 = 428,121.20 : x
  2. Step 2: Convert to fraction form
    728,015.60/1,092,671.40 = 428,121.20/x
  3. Step 3: Cross multiply
    728,015.60x = 1,092,671.40 × 428,121.20
  4. Step 4: Simplify right side
    728,015.60x = 467,795,790,973.68
  5. Step 5: Solve for x
    x = 467,795,790,973.68/728,015.60
  6. Step 6: Final answer
    x = 642,562.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.