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Finding the Fourth Proportional to 3,100.72, 4,650 and 1,020.16

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Solution

The fourth proportional to 3,100.72, 4,650 and 1,020.16 is: 1,529.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.72 : 4,650 = 1,020.16 : x
  2. Step 2: Convert to fraction form
    3,100.72/4,650 = 1,020.16/x
  3. Step 3: Cross multiply
    3,100.72x = 4,650 × 1,020.16
  4. Step 4: Simplify right side
    3,100.72x = 4,743,744
  5. Step 5: Solve for x
    x = 4,743,744/3,100.72
  6. Step 6: Final answer
    x = 1,529.88

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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.