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Finding the Fourth Proportional to 853.57, 1,280.31 and 237.31

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Solution

The fourth proportional to 853.57, 1,280.31 and 237.31 is: 355.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.57 : 1,280.31 = 237.31 : x
  2. Step 2: Convert to fraction form
    853.57/1,280.31 = 237.31/x
  3. Step 3: Cross multiply
    853.57x = 1,280.31 × 237.31
  4. Step 4: Simplify right side
    853.57x = 303,830.37
  5. Step 5: Solve for x
    x = 303,830.37/853.57
  6. Step 6: Final answer
    x = 355.95

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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.