Home / 812,475.37-1,121,215.31-449,899.21

Finding the Fourth Proportional to 812,475.37, 1,121,215.31 and 449,899.21

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Solution

The fourth proportional to 812,475.37, 1,121,215.31 and 449,899.21 is: 620,860.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,475.37 : 1,121,215.31 = 449,899.21 : x
  2. Step 2: Convert to fraction form
    812,475.37/1,121,215.31 = 449,899.21/x
  3. Step 3: Cross multiply
    812,475.37x = 1,121,215.31 × 449,899.21
  4. Step 4: Simplify right side
    812,475.37x = 504,433,879,959.41
  5. Step 5: Solve for x
    x = 504,433,879,959.41/812,475.37
  6. Step 6: Final answer
    x = 620,860.52

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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.