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Finding the Fourth Proportional to 1,448.68, 1,998.18 and 1,208.74

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Solution

The fourth proportional to 1,448.68, 1,998.18 and 1,208.74 is: 1,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,448.68 : 1,998.18 = 1,208.74 : x
  2. Step 2: Convert to fraction form
    1,448.68/1,998.18 = 1,208.74/x
  3. Step 3: Cross multiply
    1,448.68x = 1,998.18 × 1,208.74
  4. Step 4: Simplify right side
    1,448.68x = 2,415,280.09
  5. Step 5: Solve for x
    x = 2,415,280.09/1,448.68
  6. Step 6: Final answer
    x = 1,667.23

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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.