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Finding the Fourth Proportional to 1,625.64, 2,439 and 1,079.97

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Solution

The fourth proportional to 1,625.64, 2,439 and 1,079.97 is: 1,620.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,625.64 : 2,439 = 1,079.97 : x
  2. Step 2: Convert to fraction form
    1,625.64/2,439 = 1,079.97/x
  3. Step 3: Cross multiply
    1,625.64x = 2,439 × 1,079.97
  4. Step 4: Simplify right side
    1,625.64x = 2,634,046.83
  5. Step 5: Solve for x
    x = 2,634,046.83/1,625.64
  6. Step 6: Final answer
    x = 1,620.31

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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.