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Finding the Fourth Proportional to 297.78, 411.03 and 282.30

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Solution

The fourth proportional to 297.78, 411.03 and 282.30 is: 389.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    297.78 : 411.03 = 282.30 : x
  2. Step 2: Convert to fraction form
    297.78/411.03 = 282.30/x
  3. Step 3: Cross multiply
    297.78x = 411.03 × 282.30
  4. Step 4: Simplify right side
    297.78x = 116,033.77
  5. Step 5: Solve for x
    x = 116,033.77/297.78
  6. Step 6: Final answer
    x = 389.66

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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.