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Finding the Fourth Proportional to 1,203.50, 1,660.83 and 679.66

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Solution

The fourth proportional to 1,203.50, 1,660.83 and 679.66 is: 937.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.50 : 1,660.83 = 679.66 : x
  2. Step 2: Convert to fraction form
    1,203.50/1,660.83 = 679.66/x
  3. Step 3: Cross multiply
    1,203.50x = 1,660.83 × 679.66
  4. Step 4: Simplify right side
    1,203.50x = 1,128,799.72
  5. Step 5: Solve for x
    x = 1,128,799.72/1,203.50
  6. Step 6: Final answer
    x = 937.93

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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.