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Finding the Fourth Proportional to 621,030, 857,013.78 and 349,143.24

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Solution

The fourth proportional to 621,030, 857,013.78 and 349,143.24 is: 481,813.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,030 : 857,013.78 = 349,143.24 : x
  2. Step 2: Convert to fraction form
    621,030/857,013.78 = 349,143.24/x
  3. Step 3: Cross multiply
    621,030x = 857,013.78 × 349,143.24
  4. Step 4: Simplify right side
    621,030x = 299,220,567,873.85
  5. Step 5: Solve for x
    x = 299,220,567,873.85/621,030
  6. Step 6: Final answer
    x = 481,813.39

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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.