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Finding the Fourth Proportional to 206,908.40, 310,362.60 and 205,596.20

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Solution

The fourth proportional to 206,908.40, 310,362.60 and 205,596.20 is: 308,394.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,908.40 : 310,362.60 = 205,596.20 : x
  2. Step 2: Convert to fraction form
    206,908.40/310,362.60 = 205,596.20/x
  3. Step 3: Cross multiply
    206,908.40x = 310,362.60 × 205,596.20
  4. Step 4: Simplify right side
    206,908.40x = 63,809,371,182.12
  5. Step 5: Solve for x
    x = 63,809,371,182.12/206,908.40
  6. Step 6: Final answer
    x = 308,394.30

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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.