Home / 1,399,227.32-1,930,911.08-787,379.72

Finding the Fourth Proportional to 1,399,227.32, 1,930,911.08 and 787,379.72

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Solution

The fourth proportional to 1,399,227.32, 1,930,911.08 and 787,379.72 is: 1,086,571.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399,227.32 : 1,930,911.08 = 787,379.72 : x
  2. Step 2: Convert to fraction form
    1,399,227.32/1,930,911.08 = 787,379.72/x
  3. Step 3: Cross multiply
    1,399,227.32x = 1,930,911.08 × 787,379.72
  4. Step 4: Simplify right side
    1,399,227.32x = 1,520,360,211,923.84
  5. Step 5: Solve for x
    x = 1,520,360,211,923.84/1,399,227.32
  6. Step 6: Final answer
    x = 1,086,571.28

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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.