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Finding the Fourth Proportional to 3,509.91, 4,843.68 and 1,938

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Solution

The fourth proportional to 3,509.91, 4,843.68 and 1,938 is: 2,674.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,509.91 : 4,843.68 = 1,938 : x
  2. Step 2: Convert to fraction form
    3,509.91/4,843.68 = 1,938/x
  3. Step 3: Cross multiply
    3,509.91x = 4,843.68 × 1,938
  4. Step 4: Simplify right side
    3,509.91x = 9,387,051.84
  5. Step 5: Solve for x
    x = 9,387,051.84/3,509.91
  6. Step 6: Final answer
    x = 2,674.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.