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Finding the Fourth Proportional to 2,675.81, 4,013.93 and 728.00

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Solution

The fourth proportional to 2,675.81, 4,013.93 and 728.00 is: 1,092.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,675.81 : 4,013.93 = 728.00 : x
  2. Step 2: Convert to fraction form
    2,675.81/4,013.93 = 728.00/x
  3. Step 3: Cross multiply
    2,675.81x = 4,013.93 × 728.00
  4. Step 4: Simplify right side
    2,675.81x = 2,922,120.97
  5. Step 5: Solve for x
    x = 2,922,120.97/2,675.81
  6. Step 6: Final answer
    x = 1,092.05

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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.