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Finding the Fourth Proportional to 192.74, 288.12 and 146.84

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Solution

The fourth proportional to 192.74, 288.12 and 146.84 is: 219.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    192.74 : 288.12 = 146.84 : x
  2. Step 2: Convert to fraction form
    192.74/288.12 = 146.84/x
  3. Step 3: Cross multiply
    192.74x = 288.12 × 146.84
  4. Step 4: Simplify right side
    192.74x = 42,307.54
  5. Step 5: Solve for x
    x = 42,307.54/192.74
  6. Step 6: Final answer
    x = 219.51

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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.