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Finding the Fourth Proportional to 2,976.80, 4,460.88 and 1,678.64

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Solution

The fourth proportional to 2,976.80, 4,460.88 and 1,678.64 is: 2,515.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,976.80 : 4,460.88 = 1,678.64 : x
  2. Step 2: Convert to fraction form
    2,976.80/4,460.88 = 1,678.64/x
  3. Step 3: Cross multiply
    2,976.80x = 4,460.88 × 1,678.64
  4. Step 4: Simplify right side
    2,976.80x = 7,488,211.60
  5. Step 5: Solve for x
    x = 7,488,211.60/2,976.80
  6. Step 6: Final answer
    x = 2,515.52

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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.