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Finding the Fourth Proportional to 289.93, 434.79 and 192.37

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Solution

The fourth proportional to 289.93, 434.79 and 192.37 is: 288.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.93 : 434.79 = 192.37 : x
  2. Step 2: Convert to fraction form
    289.93/434.79 = 192.37/x
  3. Step 3: Cross multiply
    289.93x = 434.79 × 192.37
  4. Step 4: Simplify right side
    289.93x = 83,640.55
  5. Step 5: Solve for x
    x = 83,640.55/289.93
  6. Step 6: Final answer
    x = 288.49

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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.