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Finding the Fourth Proportional to 274.03, 378.54 and 221.51

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Solution

The fourth proportional to 274.03, 378.54 and 221.51 is: 306.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.03 : 378.54 = 221.51 : x
  2. Step 2: Convert to fraction form
    274.03/378.54 = 221.51/x
  3. Step 3: Cross multiply
    274.03x = 378.54 × 221.51
  4. Step 4: Simplify right side
    274.03x = 83,851.34
  5. Step 5: Solve for x
    x = 83,851.34/274.03
  6. Step 6: Final answer
    x = 306.00

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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.