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Finding the Fourth Proportional to 294.13, 438.90 and 255.25

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Solution

The fourth proportional to 294.13, 438.90 and 255.25 is: 380.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.13 : 438.90 = 255.25 : x
  2. Step 2: Convert to fraction form
    294.13/438.90 = 255.25/x
  3. Step 3: Cross multiply
    294.13x = 438.90 × 255.25
  4. Step 4: Simplify right side
    294.13x = 112,029.23
  5. Step 5: Solve for x
    x = 112,029.23/294.13
  6. Step 6: Final answer
    x = 380.88

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.