Home / 3,105.40-4,285.81-1,779.53

Finding the Fourth Proportional to 3,105.40, 4,285.81 and 1,779.53

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Solution

The fourth proportional to 3,105.40, 4,285.81 and 1,779.53 is: 2,455.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.40 : 4,285.81 = 1,779.53 : x
  2. Step 2: Convert to fraction form
    3,105.40/4,285.81 = 1,779.53/x
  3. Step 3: Cross multiply
    3,105.40x = 4,285.81 × 1,779.53
  4. Step 4: Simplify right side
    3,105.40x = 7,626,706.04
  5. Step 5: Solve for x
    x = 7,626,706.04/3,105.40
  6. Step 6: Final answer
    x = 2,455.95

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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.