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Finding the Fourth Proportional to 3,810.70, 5,714.16 and 1,213.30

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Solution

The fourth proportional to 3,810.70, 5,714.16 and 1,213.30 is: 1,819.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,810.70 : 5,714.16 = 1,213.30 : x
  2. Step 2: Convert to fraction form
    3,810.70/5,714.16 = 1,213.30/x
  3. Step 3: Cross multiply
    3,810.70x = 5,714.16 × 1,213.30
  4. Step 4: Simplify right side
    3,810.70x = 6,932,990.33
  5. Step 5: Solve for x
    x = 6,932,990.33/3,810.70
  6. Step 6: Final answer
    x = 1,819.35

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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.