Home / 814,221.40-1,221,332.10-515,039.80

Finding the Fourth Proportional to 814,221.40, 1,221,332.10 and 515,039.80

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Solution

The fourth proportional to 814,221.40, 1,221,332.10 and 515,039.80 is: 772,559.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,221.40 : 1,221,332.10 = 515,039.80 : x
  2. Step 2: Convert to fraction form
    814,221.40/1,221,332.10 = 515,039.80/x
  3. Step 3: Cross multiply
    814,221.40x = 1,221,332.10 × 515,039.80
  4. Step 4: Simplify right side
    814,221.40x = 629,034,640,517.58
  5. Step 5: Solve for x
    x = 629,034,640,517.58/814,221.40
  6. Step 6: Final answer
    x = 772,559.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.