Home / 1,958.20-2,930.10-1,785.40

Finding the Fourth Proportional to 1,958.20, 2,930.10 and 1,785.40

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Solution

The fourth proportional to 1,958.20, 2,930.10 and 1,785.40 is: 2,671.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.20 : 2,930.10 = 1,785.40 : x
  2. Step 2: Convert to fraction form
    1,958.20/2,930.10 = 1,785.40/x
  3. Step 3: Cross multiply
    1,958.20x = 2,930.10 × 1,785.40
  4. Step 4: Simplify right side
    1,958.20x = 5,231,400.54
  5. Step 5: Solve for x
    x = 5,231,400.54/1,958.20
  6. Step 6: Final answer
    x = 2,671.54

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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.