Home / 812,387.31-1,121,157.59-449,844.90

Finding the Fourth Proportional to 812,387.31, 1,121,157.59 and 449,844.90

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Solution

The fourth proportional to 812,387.31, 1,121,157.59 and 449,844.90 is: 620,820.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,387.31 : 1,121,157.59 = 449,844.90 : x
  2. Step 2: Convert to fraction form
    812,387.31/1,121,157.59 = 449,844.90/x
  3. Step 3: Cross multiply
    812,387.31x = 1,121,157.59 × 449,844.90
  4. Step 4: Simplify right side
    812,387.31x = 504,347,021,708.57
  5. Step 5: Solve for x
    x = 504,347,021,708.57/812,387.31
  6. Step 6: Final answer
    x = 620,820.90

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1.5x scale

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.