Home / 814,285.20-1,221,427.80-612,206.40

Finding the Fourth Proportional to 814,285.20, 1,221,427.80 and 612,206.40

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Solution

The fourth proportional to 814,285.20, 1,221,427.80 and 612,206.40 is: 918,309.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,285.20 : 1,221,427.80 = 612,206.40 : x
  2. Step 2: Convert to fraction form
    814,285.20/1,221,427.80 = 612,206.40/x
  3. Step 3: Cross multiply
    814,285.20x = 1,221,427.80 × 612,206.40
  4. Step 4: Simplify right side
    814,285.20x = 747,765,916,297.92
  5. Step 5: Solve for x
    x = 747,765,916,297.92/814,285.20
  6. Step 6: Final answer
    x = 918,309.60

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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.