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Finding the Fourth Proportional to 1,955.69, 2,699.15 and 1,247.84

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Solution

The fourth proportional to 1,955.69, 2,699.15 and 1,247.84 is: 1,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.69 : 2,699.15 = 1,247.84 : x
  2. Step 2: Convert to fraction form
    1,955.69/2,699.15 = 1,247.84/x
  3. Step 3: Cross multiply
    1,955.69x = 2,699.15 × 1,247.84
  4. Step 4: Simplify right side
    1,955.69x = 3,368,107.34
  5. Step 5: Solve for x
    x = 3,368,107.34/1,955.69
  6. Step 6: Final answer
    x = 1,722.21

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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.