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Finding the Fourth Proportional to 216,449.27, 324,676.40 and 66,688.37

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Solution

The fourth proportional to 216,449.27, 324,676.40 and 66,688.37 is: 100,033.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,449.27 : 324,676.40 = 66,688.37 : x
  2. Step 2: Convert to fraction form
    216,449.27/324,676.40 = 66,688.37/x
  3. Step 3: Cross multiply
    216,449.27x = 324,676.40 × 66,688.37
  4. Step 4: Simplify right side
    216,449.27x = 21,652,137,936.64
  5. Step 5: Solve for x
    x = 21,652,137,936.64/216,449.27
  6. Step 6: Final answer
    x = 100,033.32

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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.