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Finding the Fourth Proportional to 893.94, 1,339.28 and 660.26

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Solution

The fourth proportional to 893.94, 1,339.28 and 660.26 is: 989.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.94 : 1,339.28 = 660.26 : x
  2. Step 2: Convert to fraction form
    893.94/1,339.28 = 660.26/x
  3. Step 3: Cross multiply
    893.94x = 1,339.28 × 660.26
  4. Step 4: Simplify right side
    893.94x = 884,273.01
  5. Step 5: Solve for x
    x = 884,273.01/893.94
  6. Step 6: Final answer
    x = 989.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.