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Finding the Fourth Proportional to 297.66, 411.19 and 256.67

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Solution

The fourth proportional to 297.66, 411.19 and 256.67 is: 354.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.66 : 411.19 = 256.67 : x
  2. Step 2: Convert to fraction form
    297.66/411.19 = 256.67/x
  3. Step 3: Cross multiply
    297.66x = 411.19 × 256.67
  4. Step 4: Simplify right side
    297.66x = 105,537.44
  5. Step 5: Solve for x
    x = 105,537.44/297.66
  6. Step 6: Final answer
    x = 354.56

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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.