Home / 815,174.40-1,123,090.20-630,778.97

Finding the Fourth Proportional to 815,174.40, 1,123,090.20 and 630,778.97

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Solution

The fourth proportional to 815,174.40, 1,123,090.20 and 630,778.97 is: 869,043.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,174.40 : 1,123,090.20 = 630,778.97 : x
  2. Step 2: Convert to fraction form
    815,174.40/1,123,090.20 = 630,778.97/x
  3. Step 3: Cross multiply
    815,174.40x = 1,123,090.20 × 630,778.97
  4. Step 4: Simplify right side
    815,174.40x = 708,421,682,380.82
  5. Step 5: Solve for x
    x = 708,421,682,380.82/815,174.40
  6. Step 6: Final answer
    x = 869,043.09

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.