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Finding the Fourth Proportional to 668.36, 993.34 and 616.52

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Solution

The fourth proportional to 668.36, 993.34 and 616.52 is: 916.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.36 : 993.34 = 616.52 : x
  2. Step 2: Convert to fraction form
    668.36/993.34 = 616.52/x
  3. Step 3: Cross multiply
    668.36x = 993.34 × 616.52
  4. Step 4: Simplify right side
    668.36x = 612,413.98
  5. Step 5: Solve for x
    x = 612,413.98/668.36
  6. Step 6: Final answer
    x = 916.29

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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.