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Finding the Fourth Proportional to 207,963.40, 311,361.90 and 202,131.40

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Solution

The fourth proportional to 207,963.40, 311,361.90 and 202,131.40 is: 302,630.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,963.40 : 311,361.90 = 202,131.40 : x
  2. Step 2: Convert to fraction form
    207,963.40/311,361.90 = 202,131.40/x
  3. Step 3: Cross multiply
    207,963.40x = 311,361.90 × 202,131.40
  4. Step 4: Simplify right side
    207,963.40x = 62,936,016,753.66
  5. Step 5: Solve for x
    x = 62,936,016,753.66/207,963.40
  6. Step 6: Final answer
    x = 302,630.25

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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.