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Finding the Fourth Proportional to 300.11, 448.54 and 256.77

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Solution

The fourth proportional to 300.11, 448.54 and 256.77 is: 383.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.11 : 448.54 = 256.77 : x
  2. Step 2: Convert to fraction form
    300.11/448.54 = 256.77/x
  3. Step 3: Cross multiply
    300.11x = 448.54 × 256.77
  4. Step 4: Simplify right side
    300.11x = 115,170.97
  5. Step 5: Solve for x
    x = 115,170.97/300.11
  6. Step 6: Final answer
    x = 383.77

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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.