Home / 814,220.40-1,221,330.60-515,038.80

Finding the Fourth Proportional to 814,220.40, 1,221,330.60 and 515,038.80

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Solution

The fourth proportional to 814,220.40, 1,221,330.60 and 515,038.80 is: 772,558.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,220.40 : 1,221,330.60 = 515,038.80 : x
  2. Step 2: Convert to fraction form
    814,220.40/1,221,330.60 = 515,038.80/x
  3. Step 3: Cross multiply
    814,220.40x = 1,221,330.60 × 515,038.80
  4. Step 4: Simplify right side
    814,220.40x = 629,032,646,627.28
  5. Step 5: Solve for x
    x = 629,032,646,627.28/814,220.40
  6. Step 6: Final answer
    x = 772,558.20

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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.