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Finding the Fourth Proportional to 1,208.62, 1,667.79 and 677.46

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Solution

The fourth proportional to 1,208.62, 1,667.79 and 677.46 is: 934.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.62 : 1,667.79 = 677.46 : x
  2. Step 2: Convert to fraction form
    1,208.62/1,667.79 = 677.46/x
  3. Step 3: Cross multiply
    1,208.62x = 1,667.79 × 677.46
  4. Step 4: Simplify right side
    1,208.62x = 1,129,867.27
  5. Step 5: Solve for x
    x = 1,129,867.27/1,208.62
  6. Step 6: Final answer
    x = 934.84

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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.