Home / 2,931.28-4,397.22-1,288.90

Finding the Fourth Proportional to 2,931.28, 4,397.22 and 1,288.90

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Solution

The fourth proportional to 2,931.28, 4,397.22 and 1,288.90 is: 1,933.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,931.28 : 4,397.22 = 1,288.90 : x
  2. Step 2: Convert to fraction form
    2,931.28/4,397.22 = 1,288.90/x
  3. Step 3: Cross multiply
    2,931.28x = 4,397.22 × 1,288.90
  4. Step 4: Simplify right side
    2,931.28x = 5,667,576.86
  5. Step 5: Solve for x
    x = 5,667,576.86/2,931.28
  6. Step 6: Final answer
    x = 1,933.48

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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.