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Finding the Fourth Proportional to 621,116.69, 857,121.03 and 349,196

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Solution

The fourth proportional to 621,116.69, 857,121.03 and 349,196 is: 481,879.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,116.69 : 857,121.03 = 349,196 : x
  2. Step 2: Convert to fraction form
    621,116.69/857,121.03 = 349,196/x
  3. Step 3: Cross multiply
    621,116.69x = 857,121.03 × 349,196
  4. Step 4: Simplify right side
    621,116.69x = 299,303,235,191.88
  5. Step 5: Solve for x
    x = 299,303,235,191.88/621,116.69
  6. Step 6: Final answer
    x = 481,879.23

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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.