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Finding the Fourth Proportional to 407,858.20, 611,787.30 and 171,662.20

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Solution

The fourth proportional to 407,858.20, 611,787.30 and 171,662.20 is: 257,493.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,858.20 : 611,787.30 = 171,662.20 : x
  2. Step 2: Convert to fraction form
    407,858.20/611,787.30 = 171,662.20/x
  3. Step 3: Cross multiply
    407,858.20x = 611,787.30 × 171,662.20
  4. Step 4: Simplify right side
    407,858.20x = 105,020,753,850.06
  5. Step 5: Solve for x
    x = 105,020,753,850.06/407,858.20
  6. Step 6: Final answer
    x = 257,493.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.