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Finding the Fourth Proportional to 621,369.07, 857,481.16 and 349,436.88

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Solution

The fourth proportional to 621,369.07, 857,481.16 and 349,436.88 is: 482,218.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,369.07 : 857,481.16 = 349,436.88 : x
  2. Step 2: Convert to fraction form
    621,369.07/857,481.16 = 349,436.88/x
  3. Step 3: Cross multiply
    621,369.07x = 857,481.16 × 349,436.88
  4. Step 4: Simplify right side
    621,369.07x = 299,635,541,209.18
  5. Step 5: Solve for x
    x = 299,635,541,209.18/621,369.07
  6. Step 6: Final answer
    x = 482,218.31

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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.