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Finding the Fourth Proportional to 979.32, 1,469.08 and 330.10

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Solution

The fourth proportional to 979.32, 1,469.08 and 330.10 is: 495.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.32 : 1,469.08 = 330.10 : x
  2. Step 2: Convert to fraction form
    979.32/1,469.08 = 330.10/x
  3. Step 3: Cross multiply
    979.32x = 1,469.08 × 330.10
  4. Step 4: Simplify right side
    979.32x = 484,944.32
  5. Step 5: Solve for x
    x = 484,944.32/979.32
  6. Step 6: Final answer
    x = 495.19

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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.