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Finding the Fourth Proportional to 969.10, 1,453.87 and 319.79

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Solution

The fourth proportional to 969.10, 1,453.87 and 319.79 is: 479.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    969.10 : 1,453.87 = 319.79 : x
  2. Step 2: Convert to fraction form
    969.10/1,453.87 = 319.79/x
  3. Step 3: Cross multiply
    969.10x = 1,453.87 × 319.79
  4. Step 4: Simplify right side
    969.10x = 464,933.09
  5. Step 5: Solve for x
    x = 464,933.09/969.10
  6. Step 6: Final answer
    x = 479.76

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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.