Home / 814,953.70-1,221,446.40-415,388.80

Finding the Fourth Proportional to 814,953.70, 1,221,446.40 and 415,388.80

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Solution

The fourth proportional to 814,953.70, 1,221,446.40 and 415,388.80 is: 622,581.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,953.70 : 1,221,446.40 = 415,388.80 : x
  2. Step 2: Convert to fraction form
    814,953.70/1,221,446.40 = 415,388.80/x
  3. Step 3: Cross multiply
    814,953.70x = 1,221,446.40 × 415,388.80
  4. Step 4: Simplify right side
    814,953.70x = 507,375,154,360.32
  5. Step 5: Solve for x
    x = 507,375,154,360.32/814,953.70
  6. Step 6: Final answer
    x = 622,581.57

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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.