Home / 728,415.90-1,091,639.70-487,845.90

Finding the Fourth Proportional to 728,415.90, 1,091,639.70 and 487,845.90

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Solution

The fourth proportional to 728,415.90, 1,091,639.70 and 487,845.90 is: 731,109.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,415.90 : 1,091,639.70 = 487,845.90 : x
  2. Step 2: Convert to fraction form
    728,415.90/1,091,639.70 = 487,845.90/x
  3. Step 3: Cross multiply
    728,415.90x = 1,091,639.70 × 487,845.90
  4. Step 4: Simplify right side
    728,415.90x = 532,551,951,922.23
  5. Step 5: Solve for x
    x = 532,551,951,922.23/728,415.90
  6. Step 6: Final answer
    x = 731,109.73

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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.