Home / 812,881.09-1,121,761.20-450,303.85

Finding the Fourth Proportional to 812,881.09, 1,121,761.20 and 450,303.85

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Solution

The fourth proportional to 812,881.09, 1,121,761.20 and 450,303.85 is: 621,411.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,881.09 : 1,121,761.20 = 450,303.85 : x
  2. Step 2: Convert to fraction form
    812,881.09/1,121,761.20 = 450,303.85/x
  3. Step 3: Cross multiply
    812,881.09x = 1,121,761.20 × 450,303.85
  4. Step 4: Simplify right side
    812,881.09x = 505,133,387,140.62
  5. Step 5: Solve for x
    x = 505,133,387,140.62/812,881.09
  6. Step 6: Final answer
    x = 621,411.17

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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.