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Finding the Fourth Proportional to 4,209, 6,313.62 and 1,131

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Solution

The fourth proportional to 4,209, 6,313.62 and 1,131 is: 1,696.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,209 : 6,313.62 = 1,131 : x
  2. Step 2: Convert to fraction form
    4,209/6,313.62 = 1,131/x
  3. Step 3: Cross multiply
    4,209x = 6,313.62 × 1,131
  4. Step 4: Simplify right side
    4,209x = 7,140,704.22
  5. Step 5: Solve for x
    x = 7,140,704.22/4,209
  6. Step 6: Final answer
    x = 1,696.53

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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.