Home / 812,864.90-1,121,738.87-450,287.64

Finding the Fourth Proportional to 812,864.90, 1,121,738.87 and 450,287.64

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Solution

The fourth proportional to 812,864.90, 1,121,738.87 and 450,287.64 is: 621,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,864.90 : 1,121,738.87 = 450,287.64 : x
  2. Step 2: Convert to fraction form
    812,864.90/1,121,738.87 = 450,287.64/x
  3. Step 3: Cross multiply
    812,864.90x = 1,121,738.87 × 450,287.64
  4. Step 4: Simplify right side
    812,864.90x = 505,105,149,594.29
  5. Step 5: Solve for x
    x = 505,105,149,594.29/812,864.90
  6. Step 6: Final answer
    x = 621,388.80

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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.