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Finding the Fourth Proportional to 1,893.94, 2,612.62 and 1,288.06

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Solution

The fourth proportional to 1,893.94, 2,612.62 and 1,288.06 is: 1,776.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,893.94 : 2,612.62 = 1,288.06 : x
  2. Step 2: Convert to fraction form
    1,893.94/2,612.62 = 1,288.06/x
  3. Step 3: Cross multiply
    1,893.94x = 2,612.62 × 1,288.06
  4. Step 4: Simplify right side
    1,893.94x = 3,365,211.32
  5. Step 5: Solve for x
    x = 3,365,211.32/1,893.94
  6. Step 6: Final answer
    x = 1,776.83

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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.