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Finding the Fourth Proportional to 3,279, 4,918.68 and 970.68

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Solution

The fourth proportional to 3,279, 4,918.68 and 970.68 is: 1,456.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,279 : 4,918.68 = 970.68 : x
  2. Step 2: Convert to fraction form
    3,279/4,918.68 = 970.68/x
  3. Step 3: Cross multiply
    3,279x = 4,918.68 × 970.68
  4. Step 4: Simplify right side
    3,279x = 4,774,464.30
  5. Step 5: Solve for x
    x = 4,774,464.30/3,279
  6. Step 6: Final answer
    x = 1,456.07

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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.