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Finding the Fourth Proportional to 554,745.69, 765,506.79 and 313,050.78

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Solution

The fourth proportional to 554,745.69, 765,506.79 and 313,050.78 is: 431,986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,745.69 : 765,506.79 = 313,050.78 : x
  2. Step 2: Convert to fraction form
    554,745.69/765,506.79 = 313,050.78/x
  3. Step 3: Cross multiply
    554,745.69x = 765,506.79 × 313,050.78
  4. Step 4: Simplify right side
    554,745.69x = 239,642,497,704.80
  5. Step 5: Solve for x
    x = 239,642,497,704.80/554,745.69
  6. Step 6: Final answer
    x = 431,986.23

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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.