Home / 2,103.79-2,902.84-1,318.90

Finding the Fourth Proportional to 2,103.79, 2,902.84 and 1,318.90

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Solution

The fourth proportional to 2,103.79, 2,902.84 and 1,318.90 is: 1,819.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.79 : 2,902.84 = 1,318.90 : x
  2. Step 2: Convert to fraction form
    2,103.79/2,902.84 = 1,318.90/x
  3. Step 3: Cross multiply
    2,103.79x = 2,902.84 × 1,318.90
  4. Step 4: Simplify right side
    2,103.79x = 3,828,555.68
  5. Step 5: Solve for x
    x = 3,828,555.68/2,103.79
  6. Step 6: Final answer
    x = 1,819.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.