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Finding the Fourth Proportional to 3,216.96, 4,820.64 and 1,980.96

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Solution

The fourth proportional to 3,216.96, 4,820.64 and 1,980.96 is: 2,968.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,216.96 : 4,820.64 = 1,980.96 : x
  2. Step 2: Convert to fraction form
    3,216.96/4,820.64 = 1,980.96/x
  3. Step 3: Cross multiply
    3,216.96x = 4,820.64 × 1,980.96
  4. Step 4: Simplify right side
    3,216.96x = 9,549,495.01
  5. Step 5: Solve for x
    x = 9,549,495.01/3,216.96
  6. Step 6: Final answer
    x = 2,968.48

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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.