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Finding the Fourth Proportional to 1,679.07, 2,517.71 and 857.01

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Solution

The fourth proportional to 1,679.07, 2,517.71 and 857.01 is: 1,285.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.07 : 2,517.71 = 857.01 : x
  2. Step 2: Convert to fraction form
    1,679.07/2,517.71 = 857.01/x
  3. Step 3: Cross multiply
    1,679.07x = 2,517.71 × 857.01
  4. Step 4: Simplify right side
    1,679.07x = 2,157,698.36
  5. Step 5: Solve for x
    x = 2,157,698.36/1,679.07
  6. Step 6: Final answer
    x = 1,285.06

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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.