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Finding the Fourth Proportional to 825.18, 1,237.78 and 277.37

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Solution

The fourth proportional to 825.18, 1,237.78 and 277.37 is: 416.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.18 : 1,237.78 = 277.37 : x
  2. Step 2: Convert to fraction form
    825.18/1,237.78 = 277.37/x
  3. Step 3: Cross multiply
    825.18x = 1,237.78 × 277.37
  4. Step 4: Simplify right side
    825.18x = 343,316.85
  5. Step 5: Solve for x
    x = 343,316.85/825.18
  6. Step 6: Final answer
    x = 416.05

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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.