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Finding the Fourth Proportional to 1,634.78, 2,256.46 and 1,005.41

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Solution

The fourth proportional to 1,634.78, 2,256.46 and 1,005.41 is: 1,387.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,634.78 : 2,256.46 = 1,005.41 : x
  2. Step 2: Convert to fraction form
    1,634.78/2,256.46 = 1,005.41/x
  3. Step 3: Cross multiply
    1,634.78x = 2,256.46 × 1,005.41
  4. Step 4: Simplify right side
    1,634.78x = 2,268,670.58
  5. Step 5: Solve for x
    x = 2,268,670.58/1,634.78
  6. Step 6: Final answer
    x = 1,387.75

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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.