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Finding the Fourth Proportional to 2,716, 4,072.65 and 1,328.47

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Solution

The fourth proportional to 2,716, 4,072.65 and 1,328.47 is: 1,992.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,716 : 4,072.65 = 1,328.47 : x
  2. Step 2: Convert to fraction form
    2,716/4,072.65 = 1,328.47/x
  3. Step 3: Cross multiply
    2,716x = 4,072.65 × 1,328.47
  4. Step 4: Simplify right side
    2,716x = 5,410,393.35
  5. Step 5: Solve for x
    x = 5,410,393.35/2,716
  6. Step 6: Final answer
    x = 1,992.04

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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.