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Finding the Fourth Proportional to 268.89, 371.40 and 237.90

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Solution

The fourth proportional to 268.89, 371.40 and 237.90 is: 328.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.89 : 371.40 = 237.90 : x
  2. Step 2: Convert to fraction form
    268.89/371.40 = 237.90/x
  3. Step 3: Cross multiply
    268.89x = 371.40 × 237.90
  4. Step 4: Simplify right side
    268.89x = 88,356.06
  5. Step 5: Solve for x
    x = 88,356.06/268.89
  6. Step 6: Final answer
    x = 328.60

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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.