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Finding the Fourth Proportional to 1,851.08, 2,780.13 and 1,639.40

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Solution

The fourth proportional to 1,851.08, 2,780.13 and 1,639.40 is: 2,462.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.08 : 2,780.13 = 1,639.40 : x
  2. Step 2: Convert to fraction form
    1,851.08/2,780.13 = 1,639.40/x
  3. Step 3: Cross multiply
    1,851.08x = 2,780.13 × 1,639.40
  4. Step 4: Simplify right side
    1,851.08x = 4,557,745.12
  5. Step 5: Solve for x
    x = 4,557,745.12/1,851.08
  6. Step 6: Final answer
    x = 2,462.21

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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.