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Finding the Fourth Proportional to 245.63, 339.32 and 172.15

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Solution

The fourth proportional to 245.63, 339.32 and 172.15 is: 237.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.63 : 339.32 = 172.15 : x
  2. Step 2: Convert to fraction form
    245.63/339.32 = 172.15/x
  3. Step 3: Cross multiply
    245.63x = 339.32 × 172.15
  4. Step 4: Simplify right side
    245.63x = 58,413.52
  5. Step 5: Solve for x
    x = 58,413.52/245.63
  6. Step 6: Final answer
    x = 237.81

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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.