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Finding the Fourth Proportional to 1,919.87, 2,877.64 and 946.66

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Solution

The fourth proportional to 1,919.87, 2,877.64 and 946.66 is: 1,418.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.87 : 2,877.64 = 946.66 : x
  2. Step 2: Convert to fraction form
    1,919.87/2,877.64 = 946.66/x
  3. Step 3: Cross multiply
    1,919.87x = 2,877.64 × 946.66
  4. Step 4: Simplify right side
    1,919.87x = 2,724,146.68
  5. Step 5: Solve for x
    x = 2,724,146.68/1,919.87
  6. Step 6: Final answer
    x = 1,418.92

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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.