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Finding the Fourth Proportional to 4,714.78, 7,072.17 and 1,939.51

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Solution

The fourth proportional to 4,714.78, 7,072.17 and 1,939.51 is: 2,909.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,714.78 : 7,072.17 = 1,939.51 : x
  2. Step 2: Convert to fraction form
    4,714.78/7,072.17 = 1,939.51/x
  3. Step 3: Cross multiply
    4,714.78x = 7,072.17 × 1,939.51
  4. Step 4: Simplify right side
    4,714.78x = 13,716,544.44
  5. Step 5: Solve for x
    x = 13,716,544.44/4,714.78
  6. Step 6: Final answer
    x = 2,909.27

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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.