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Finding the Fourth Proportional to 300.96, 452.08 and 258.72

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Solution

The fourth proportional to 300.96, 452.08 and 258.72 is: 388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.96 : 452.08 = 258.72 : x
  2. Step 2: Convert to fraction form
    300.96/452.08 = 258.72/x
  3. Step 3: Cross multiply
    300.96x = 452.08 × 258.72
  4. Step 4: Simplify right side
    300.96x = 116,962.14
  5. Step 5: Solve for x
    x = 116,962.14/300.96
  6. Step 6: Final answer
    x = 388.63

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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.