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Finding the Fourth Proportional to 893.91, 1,233.60 and 495.60

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Solution

The fourth proportional to 893.91, 1,233.60 and 495.60 is: 683.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.91 : 1,233.60 = 495.60 : x
  2. Step 2: Convert to fraction form
    893.91/1,233.60 = 495.60/x
  3. Step 3: Cross multiply
    893.91x = 1,233.60 × 495.60
  4. Step 4: Simplify right side
    893.91x = 611,372.16
  5. Step 5: Solve for x
    x = 611,372.16/893.91
  6. Step 6: Final answer
    x = 683.93

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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.