Home / 783,729.20-1,175,926.67-428,328.03

Finding the Fourth Proportional to 783,729.20, 1,175,926.67 and 428,328.03

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Solution

The fourth proportional to 783,729.20, 1,175,926.67 and 428,328.03 is: 642,673.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,729.20 : 1,175,926.67 = 428,328.03 : x
  2. Step 2: Convert to fraction form
    783,729.20/1,175,926.67 = 428,328.03/x
  3. Step 3: Cross multiply
    783,729.20x = 1,175,926.67 × 428,328.03
  4. Step 4: Simplify right side
    783,729.20x = 503,682,351,843.92
  5. Step 5: Solve for x
    x = 503,682,351,843.92/783,729.20
  6. Step 6: Final answer
    x = 642,673.97

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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.