Home / 812,785.19-1,121,680.48-450,209

Finding the Fourth Proportional to 812,785.19, 1,121,680.48 and 450,209

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Solution

The fourth proportional to 812,785.19, 1,121,680.48 and 450,209 is: 621,308.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,785.19 : 1,121,680.48 = 450,209 : x
  2. Step 2: Convert to fraction form
    812,785.19/1,121,680.48 = 450,209/x
  3. Step 3: Cross multiply
    812,785.19x = 1,121,680.48 × 450,209
  4. Step 4: Simplify right side
    812,785.19x = 504,990,647,220.32
  5. Step 5: Solve for x
    x = 504,990,647,220.32/812,785.19
  6. Step 6: Final answer
    x = 621,308.87

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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.