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Finding the Fourth Proportional to 1,208.49, 1,667.16 and 710.97

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Solution

The fourth proportional to 1,208.49, 1,667.16 and 710.97 is: 980.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.49 : 1,667.16 = 710.97 : x
  2. Step 2: Convert to fraction form
    1,208.49/1,667.16 = 710.97/x
  3. Step 3: Cross multiply
    1,208.49x = 1,667.16 × 710.97
  4. Step 4: Simplify right side
    1,208.49x = 1,185,300.75
  5. Step 5: Solve for x
    x = 1,185,300.75/1,208.49
  6. Step 6: Final answer
    x = 980.81

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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.