Home / 812,490.42-1,121,223.02-449,906.52

Finding the Fourth Proportional to 812,490.42, 1,121,223.02 and 449,906.52

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Solution

The fourth proportional to 812,490.42, 1,121,223.02 and 449,906.52 is: 620,863.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,490.42 : 1,121,223.02 = 449,906.52 : x
  2. Step 2: Convert to fraction form
    812,490.42/1,121,223.02 = 449,906.52/x
  3. Step 3: Cross multiply
    812,490.42x = 1,121,223.02 × 449,906.52
  4. Step 4: Simplify right side
    812,490.42x = 504,445,547,072.09
  5. Step 5: Solve for x
    x = 504,445,547,072.09/812,490.42
  6. Step 6: Final answer
    x = 620,863.38

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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.