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Finding the Fourth Proportional to 2,107.38, 2,907.38 and 1,320.06

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Solution

The fourth proportional to 2,107.38, 2,907.38 and 1,320.06 is: 1,821.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.38 : 2,907.38 = 1,320.06 : x
  2. Step 2: Convert to fraction form
    2,107.38/2,907.38 = 1,320.06/x
  3. Step 3: Cross multiply
    2,107.38x = 2,907.38 × 1,320.06
  4. Step 4: Simplify right side
    2,107.38x = 3,837,916.04
  5. Step 5: Solve for x
    x = 3,837,916.04/2,107.38
  6. Step 6: Final answer
    x = 1,821.18

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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.