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Finding the Fourth Proportional to 205.77, 309.70 and 154.68

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Solution

The fourth proportional to 205.77, 309.70 and 154.68 is: 232.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    205.77 : 309.70 = 154.68 : x
  2. Step 2: Convert to fraction form
    205.77/309.70 = 154.68/x
  3. Step 3: Cross multiply
    205.77x = 309.70 × 154.68
  4. Step 4: Simplify right side
    205.77x = 47,904.40
  5. Step 5: Solve for x
    x = 47,904.40/205.77
  6. Step 6: Final answer
    x = 232.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.