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Finding the Fourth Proportional to 893.04, 1,339.78 and 721.27

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Solution

The fourth proportional to 893.04, 1,339.78 and 721.27 is: 1,082.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.04 : 1,339.78 = 721.27 : x
  2. Step 2: Convert to fraction form
    893.04/1,339.78 = 721.27/x
  3. Step 3: Cross multiply
    893.04x = 1,339.78 × 721.27
  4. Step 4: Simplify right side
    893.04x = 966,336.42
  5. Step 5: Solve for x
    x = 966,336.42/893.04
  6. Step 6: Final answer
    x = 1,082.08

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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.