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Finding the Fourth Proportional to 979.88, 1,469.81 and 295.88

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Solution

The fourth proportional to 979.88, 1,469.81 and 295.88 is: 443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.88 : 1,469.81 = 295.88 : x
  2. Step 2: Convert to fraction form
    979.88/1,469.81 = 295.88/x
  3. Step 3: Cross multiply
    979.88x = 1,469.81 × 295.88
  4. Step 4: Simplify right side
    979.88x = 434,880.77
  5. Step 5: Solve for x
    x = 434,880.77/979.88
  6. Step 6: Final answer
    x = 443.81

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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.