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Finding the Fourth Proportional to 289.79, 434.73 and 94.80

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Solution

The fourth proportional to 289.79, 434.73 and 94.80 is: 142.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.79 : 434.73 = 94.80 : x
  2. Step 2: Convert to fraction form
    289.79/434.73 = 94.80/x
  3. Step 3: Cross multiply
    289.79x = 434.73 × 94.80
  4. Step 4: Simplify right side
    289.79x = 41,212.40
  5. Step 5: Solve for x
    x = 41,212.40/289.79
  6. Step 6: Final answer
    x = 142.22

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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.