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Finding the Fourth Proportional to 897.26, 1,236.80 and 821.93

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Solution

The fourth proportional to 897.26, 1,236.80 and 821.93 is: 1,132.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.26 : 1,236.80 = 821.93 : x
  2. Step 2: Convert to fraction form
    897.26/1,236.80 = 821.93/x
  3. Step 3: Cross multiply
    897.26x = 1,236.80 × 821.93
  4. Step 4: Simplify right side
    897.26x = 1,016,558.89
  5. Step 5: Solve for x
    x = 1,016,558.89/897.26
  6. Step 6: Final answer
    x = 1,132.97

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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.