Home / 812,489.42-1,121,221.64-449,905.52

Finding the Fourth Proportional to 812,489.42, 1,121,221.64 and 449,905.52

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Solution

The fourth proportional to 812,489.42, 1,121,221.64 and 449,905.52 is: 620,862.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,489.42 : 1,121,221.64 = 449,905.52 : x
  2. Step 2: Convert to fraction form
    812,489.42/1,121,221.64 = 449,905.52/x
  3. Step 3: Cross multiply
    812,489.42x = 1,121,221.64 × 449,905.52
  4. Step 4: Simplify right side
    812,489.42x = 504,443,804,979.45
  5. Step 5: Solve for x
    x = 504,443,804,979.45/812,489.42
  6. Step 6: Final answer
    x = 620,862.00

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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.