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Finding the Fourth Proportional to 621,375.08, 857,489.42 and 349,442.90

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Solution

The fourth proportional to 621,375.08, 857,489.42 and 349,442.90 is: 482,226.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,375.08 : 857,489.42 = 349,442.90 : x
  2. Step 2: Convert to fraction form
    621,375.08/857,489.42 = 349,442.90/x
  3. Step 3: Cross multiply
    621,375.08x = 857,489.42 × 349,442.90
  4. Step 4: Simplify right side
    621,375.08x = 299,643,589,644.12
  5. Step 5: Solve for x
    x = 299,643,589,644.12/621,375.08
  6. Step 6: Final answer
    x = 482,226.60

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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.