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Finding the Fourth Proportional to 621,661.36, 857,891.28 and 349,729.36

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Solution

The fourth proportional to 621,661.36, 857,891.28 and 349,729.36 is: 482,625.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,661.36 : 857,891.28 = 349,729.36 : x
  2. Step 2: Convert to fraction form
    621,661.36/857,891.28 = 349,729.36/x
  3. Step 3: Cross multiply
    621,661.36x = 857,891.28 × 349,729.36
  4. Step 4: Simplify right side
    621,661.36x = 300,029,768,303.98
  5. Step 5: Solve for x
    x = 300,029,768,303.98/621,661.36
  6. Step 6: Final answer
    x = 482,625.73

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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.