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Finding the Fourth Proportional to 274,054.20, 411,081.30 and 211,769.40

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Solution

The fourth proportional to 274,054.20, 411,081.30 and 211,769.40 is: 317,654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,054.20 : 411,081.30 = 211,769.40 : x
  2. Step 2: Convert to fraction form
    274,054.20/411,081.30 = 211,769.40/x
  3. Step 3: Cross multiply
    274,054.20x = 411,081.30 × 211,769.40
  4. Step 4: Simplify right side
    274,054.20x = 87,054,440,252.22
  5. Step 5: Solve for x
    x = 87,054,440,252.22/274,054.20
  6. Step 6: Final answer
    x = 317,654.10

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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.