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Finding the Fourth Proportional to 216,437.28, 324,691.44 and 66,674.28

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Solution

The fourth proportional to 216,437.28, 324,691.44 and 66,674.28 is: 100,022.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,437.28 : 324,691.44 = 66,674.28 : x
  2. Step 2: Convert to fraction form
    216,437.28/324,691.44 = 66,674.28/x
  3. Step 3: Cross multiply
    216,437.28x = 324,691.44 × 66,674.28
  4. Step 4: Simplify right side
    216,437.28x = 21,648,567,984.16
  5. Step 5: Solve for x
    x = 21,648,567,984.16/216,437.28
  6. Step 6: Final answer
    x = 100,022.36

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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.