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Finding the Fourth Proportional to 621,682.47, 857,872.62 and 349,696.23

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Solution

The fourth proportional to 621,682.47, 857,872.62 and 349,696.23 is: 482,553.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,682.47 : 857,872.62 = 349,696.23 : x
  2. Step 2: Convert to fraction form
    621,682.47/857,872.62 = 349,696.23/x
  3. Step 3: Cross multiply
    621,682.47x = 857,872.62 × 349,696.23
  4. Step 4: Simplify right side
    621,682.47x = 299,994,821,034.22
  5. Step 5: Solve for x
    x = 299,994,821,034.22/621,682.47
  6. Step 6: Final answer
    x = 482,553.13

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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.