Home / 812,984.90-1,121,828.38-450,318.78

Finding the Fourth Proportional to 812,984.90, 1,121,828.38 and 450,318.78

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Solution

The fourth proportional to 812,984.90, 1,121,828.38 and 450,318.78 is: 621,389.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,984.90 : 1,121,828.38 = 450,318.78 : x
  2. Step 2: Convert to fraction form
    812,984.90/1,121,828.38 = 450,318.78/x
  3. Step 3: Cross multiply
    812,984.90x = 1,121,828.38 × 450,318.78
  4. Step 4: Simplify right side
    812,984.90x = 505,180,387,450.98
  5. Step 5: Solve for x
    x = 505,180,387,450.98/812,984.90
  6. Step 6: Final answer
    x = 621,389.63

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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.