Home / 812,395.81-1,121,169.32-449,853.40

Finding the Fourth Proportional to 812,395.81, 1,121,169.32 and 449,853.40

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Solution

The fourth proportional to 812,395.81, 1,121,169.32 and 449,853.40 is: 620,832.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,395.81 : 1,121,169.32 = 449,853.40 : x
  2. Step 2: Convert to fraction form
    812,395.81/1,121,169.32 = 449,853.40/x
  3. Step 3: Cross multiply
    812,395.81x = 1,121,169.32 × 449,853.40
  4. Step 4: Simplify right side
    812,395.81x = 504,361,830,577.69
  5. Step 5: Solve for x
    x = 504,361,830,577.69/812,395.81
  6. Step 6: Final answer
    x = 620,832.63

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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.