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Finding the Fourth Proportional to 1,919.77, 2,878.74 and 1,097.82

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Solution

The fourth proportional to 1,919.77, 2,878.74 and 1,097.82 is: 1,646.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.77 : 2,878.74 = 1,097.82 : x
  2. Step 2: Convert to fraction form
    1,919.77/2,878.74 = 1,097.82/x
  3. Step 3: Cross multiply
    1,919.77x = 2,878.74 × 1,097.82
  4. Step 4: Simplify right side
    1,919.77x = 3,160,338.35
  5. Step 5: Solve for x
    x = 3,160,338.35/1,919.77
  6. Step 6: Final answer
    x = 1,646.21

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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.