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Finding the Fourth Proportional to 3,216.66, 4,815.60 and 1,980.36

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Solution

The fourth proportional to 3,216.66, 4,815.60 and 1,980.36 is: 2,964.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216.66 : 4,815.60 = 1,980.36 : x
  2. Step 2: Convert to fraction form
    3,216.66/4,815.60 = 1,980.36/x
  3. Step 3: Cross multiply
    3,216.66x = 4,815.60 × 1,980.36
  4. Step 4: Simplify right side
    3,216.66x = 9,536,621.62
  5. Step 5: Solve for x
    x = 9,536,621.62/3,216.66
  6. Step 6: Final answer
    x = 2,964.76

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1.5x scale

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.