Home / 693,775.80-1,040,663.70-409,174.20

Finding the Fourth Proportional to 693,775.80, 1,040,663.70 and 409,174.20

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Solution

The fourth proportional to 693,775.80, 1,040,663.70 and 409,174.20 is: 613,761.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,775.80 : 1,040,663.70 = 409,174.20 : x
  2. Step 2: Convert to fraction form
    693,775.80/1,040,663.70 = 409,174.20/x
  3. Step 3: Cross multiply
    693,775.80x = 1,040,663.70 × 409,174.20
  4. Step 4: Simplify right side
    693,775.80x = 425,812,736,916.54
  5. Step 5: Solve for x
    x = 425,812,736,916.54/693,775.80
  6. Step 6: Final answer
    x = 613,761.30

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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.