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Finding the Fourth Proportional to 6,286.20, 9,429 and 1,606.20

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Solution

The fourth proportional to 6,286.20, 9,429 and 1,606.20 is: 2,409.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,286.20 : 9,429 = 1,606.20 : x
  2. Step 2: Convert to fraction form
    6,286.20/9,429 = 1,606.20/x
  3. Step 3: Cross multiply
    6,286.20x = 9,429 × 1,606.20
  4. Step 4: Simplify right side
    6,286.20x = 15,144,859.80
  5. Step 5: Solve for x
    x = 15,144,859.80/6,286.20
  6. Step 6: Final answer
    x = 2,409.22

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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.