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Finding the Fourth Proportional to 4,202, 6,302.88 and 1,279.88

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Solution

The fourth proportional to 4,202, 6,302.88 and 1,279.88 is: 1,919.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,202 : 6,302.88 = 1,279.88 : x
  2. Step 2: Convert to fraction form
    4,202/6,302.88 = 1,279.88/x
  3. Step 3: Cross multiply
    4,202x = 6,302.88 × 1,279.88
  4. Step 4: Simplify right side
    4,202x = 8,066,930.05
  5. Step 5: Solve for x
    x = 8,066,930.05/4,202
  6. Step 6: Final answer
    x = 1,919.78

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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.