Home / 812,943.60-1,121,796.30-450,382.74

Finding the Fourth Proportional to 812,943.60, 1,121,796.30 and 450,382.74

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Solution

The fourth proportional to 812,943.60, 1,121,796.30 and 450,382.74 is: 621,491.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,943.60 : 1,121,796.30 = 450,382.74 : x
  2. Step 2: Convert to fraction form
    812,943.60/1,121,796.30 = 450,382.74/x
  3. Step 3: Cross multiply
    812,943.60x = 1,121,796.30 × 450,382.74
  4. Step 4: Simplify right side
    812,943.60x = 505,237,691,315.86
  5. Step 5: Solve for x
    x = 505,237,691,315.86/812,943.60
  6. Step 6: Final answer
    x = 621,491.69

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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.