Home / 1,428,231.24-1,970,977.32-783,639.72

Finding the Fourth Proportional to 1,428,231.24, 1,970,977.32 and 783,639.72

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Solution

The fourth proportional to 1,428,231.24, 1,970,977.32 and 783,639.72 is: 1,081,432.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,231.24 : 1,970,977.32 = 783,639.72 : x
  2. Step 2: Convert to fraction form
    1,428,231.24/1,970,977.32 = 783,639.72/x
  3. Step 3: Cross multiply
    1,428,231.24x = 1,970,977.32 × 783,639.72
  4. Step 4: Simplify right side
    1,428,231.24x = 1,544,536,115,171.15
  5. Step 5: Solve for x
    x = 1,544,536,115,171.15/1,428,231.24
  6. Step 6: Final answer
    x = 1,081,432.80

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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.