Home / 911,979.45-1,368,245.95-485,442.70

Finding the Fourth Proportional to 911,979.45, 1,368,245.95 and 485,442.70

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Solution

The fourth proportional to 911,979.45, 1,368,245.95 and 485,442.70 is: 728,311.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,979.45 : 1,368,245.95 = 485,442.70 : x
  2. Step 2: Convert to fraction form
    911,979.45/1,368,245.95 = 485,442.70/x
  3. Step 3: Cross multiply
    911,979.45x = 1,368,245.95 × 485,442.70
  4. Step 4: Simplify right side
    911,979.45x = 664,205,005,804.85
  5. Step 5: Solve for x
    x = 664,205,005,804.85/911,979.45
  6. Step 6: Final answer
    x = 728,311.37

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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.