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Finding the Fourth Proportional to 1,202.91, 1,660 and 671.83

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Solution

The fourth proportional to 1,202.91, 1,660 and 671.83 is: 927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.91 : 1,660 = 671.83 : x
  2. Step 2: Convert to fraction form
    1,202.91/1,660 = 671.83/x
  3. Step 3: Cross multiply
    1,202.91x = 1,660 × 671.83
  4. Step 4: Simplify right side
    1,202.91x = 1,115,237.80
  5. Step 5: Solve for x
    x = 1,115,237.80/1,202.91
  6. Step 6: Final answer
    x = 927.12

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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.