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Finding the Fourth Proportional to 982.36, 1,356.06 and 672.04

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Solution

The fourth proportional to 982.36, 1,356.06 and 672.04 is: 927.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.36 : 1,356.06 = 672.04 : x
  2. Step 2: Convert to fraction form
    982.36/1,356.06 = 672.04/x
  3. Step 3: Cross multiply
    982.36x = 1,356.06 × 672.04
  4. Step 4: Simplify right side
    982.36x = 911,326.56
  5. Step 5: Solve for x
    x = 911,326.56/982.36
  6. Step 6: Final answer
    x = 927.69

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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.