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Finding the Fourth Proportional to 893.89, 1,333.30 and 866.55

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Solution

The fourth proportional to 893.89, 1,333.30 and 866.55 is: 1,292.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.89 : 1,333.30 = 866.55 : x
  2. Step 2: Convert to fraction form
    893.89/1,333.30 = 866.55/x
  3. Step 3: Cross multiply
    893.89x = 1,333.30 × 866.55
  4. Step 4: Simplify right side
    893.89x = 1,155,371.12
  5. Step 5: Solve for x
    x = 1,155,371.12/893.89
  6. Step 6: Final answer
    x = 1,292.52

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.