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Finding the Fourth Proportional to 294.22, 406.53 and 257.32

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Solution

The fourth proportional to 294.22, 406.53 and 257.32 is: 355.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.22 : 406.53 = 257.32 : x
  2. Step 2: Convert to fraction form
    294.22/406.53 = 257.32/x
  3. Step 3: Cross multiply
    294.22x = 406.53 × 257.32
  4. Step 4: Simplify right side
    294.22x = 104,608.30
  5. Step 5: Solve for x
    x = 104,608.30/294.22
  6. Step 6: Final answer
    x = 355.54

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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.