Home / 3,286.56-4,931.28-1,438.14

Finding the Fourth Proportional to 3,286.56, 4,931.28 and 1,438.14

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Solution

The fourth proportional to 3,286.56, 4,931.28 and 1,438.14 is: 2,157.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.56 : 4,931.28 = 1,438.14 : x
  2. Step 2: Convert to fraction form
    3,286.56/4,931.28 = 1,438.14/x
  3. Step 3: Cross multiply
    3,286.56x = 4,931.28 × 1,438.14
  4. Step 4: Simplify right side
    3,286.56x = 7,091,871.02
  5. Step 5: Solve for x
    x = 7,091,871.02/3,286.56
  6. Step 6: Final answer
    x = 2,157.84

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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.