Home / 2,455.38-3,678.21-2,108.70

Finding the Fourth Proportional to 2,455.38, 3,678.21 and 2,108.70

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Solution

The fourth proportional to 2,455.38, 3,678.21 and 2,108.70 is: 3,158.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,455.38 : 3,678.21 = 2,108.70 : x
  2. Step 2: Convert to fraction form
    2,455.38/3,678.21 = 2,108.70/x
  3. Step 3: Cross multiply
    2,455.38x = 3,678.21 × 2,108.70
  4. Step 4: Simplify right side
    2,455.38x = 7,756,241.43
  5. Step 5: Solve for x
    x = 7,756,241.43/2,455.38
  6. Step 6: Final answer
    x = 3,158.88

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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.