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Finding the Fourth Proportional to 1,208.41, 1,667.60 and 684.44

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Solution

The fourth proportional to 1,208.41, 1,667.60 and 684.44 is: 944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.41 : 1,667.60 = 684.44 : x
  2. Step 2: Convert to fraction form
    1,208.41/1,667.60 = 684.44/x
  3. Step 3: Cross multiply
    1,208.41x = 1,667.60 × 684.44
  4. Step 4: Simplify right side
    1,208.41x = 1,141,372.14
  5. Step 5: Solve for x
    x = 1,141,372.14/1,208.41
  6. Step 6: Final answer
    x = 944.52

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1.5x scale

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.