Home / 812,434.29-1,121,171.12-449,857.45

Finding the Fourth Proportional to 812,434.29, 1,121,171.12 and 449,857.45

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Solution

The fourth proportional to 812,434.29, 1,121,171.12 and 449,857.45 is: 620,809.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,434.29 : 1,121,171.12 = 449,857.45 : x
  2. Step 2: Convert to fraction form
    812,434.29/1,121,171.12 = 449,857.45/x
  3. Step 3: Cross multiply
    812,434.29x = 1,121,171.12 × 449,857.45
  4. Step 4: Simplify right side
    812,434.29x = 504,367,181,056.84
  5. Step 5: Solve for x
    x = 504,367,181,056.84/812,434.29
  6. Step 6: Final answer
    x = 620,809.81

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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.