Home / 814,881.70-1,221,338.40-415,316.80

Finding the Fourth Proportional to 814,881.70, 1,221,338.40 and 415,316.80

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Solution

The fourth proportional to 814,881.70, 1,221,338.40 and 415,316.80 is: 622,473.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,881.70 : 1,221,338.40 = 415,316.80 : x
  2. Step 2: Convert to fraction form
    814,881.70/1,221,338.40 = 415,316.80/x
  3. Step 3: Cross multiply
    814,881.70x = 1,221,338.40 × 415,316.80
  4. Step 4: Simplify right side
    814,881.70x = 507,242,356,005.12
  5. Step 5: Solve for x
    x = 507,242,356,005.12/814,881.70
  6. Step 6: Final answer
    x = 622,473.61

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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.