Home / 693,431.80-1,040,147.70-408,830.20

Finding the Fourth Proportional to 693,431.80, 1,040,147.70 and 408,830.20

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Solution

The fourth proportional to 693,431.80, 1,040,147.70 and 408,830.20 is: 613,245.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,431.80 : 1,040,147.70 = 408,830.20 : x
  2. Step 2: Convert to fraction form
    693,431.80/1,040,147.70 = 408,830.20/x
  3. Step 3: Cross multiply
    693,431.80x = 1,040,147.70 × 408,830.20
  4. Step 4: Simplify right side
    693,431.80x = 425,243,792,220.54
  5. Step 5: Solve for x
    x = 425,243,792,220.54/693,431.80
  6. Step 6: Final answer
    x = 613,245.30

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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.