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Finding the Fourth Proportional to 294.28, 441.43 and 172.42

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Solution

The fourth proportional to 294.28, 441.43 and 172.42 is: 258.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.28 : 441.43 = 172.42 : x
  2. Step 2: Convert to fraction form
    294.28/441.43 = 172.42/x
  3. Step 3: Cross multiply
    294.28x = 441.43 × 172.42
  4. Step 4: Simplify right side
    294.28x = 76,111.36
  5. Step 5: Solve for x
    x = 76,111.36/294.28
  6. Step 6: Final answer
    x = 258.64

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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.