Home / 2,078.45-3,117.67-845.53

Finding the Fourth Proportional to 2,078.45, 3,117.67 and 845.53

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Solution

The fourth proportional to 2,078.45, 3,117.67 and 845.53 is: 1,268.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,078.45 : 3,117.67 = 845.53 : x
  2. Step 2: Convert to fraction form
    2,078.45/3,117.67 = 845.53/x
  3. Step 3: Cross multiply
    2,078.45x = 3,117.67 × 845.53
  4. Step 4: Simplify right side
    2,078.45x = 2,636,078.36
  5. Step 5: Solve for x
    x = 2,636,078.36/2,078.45
  6. Step 6: Final answer
    x = 1,268.29

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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.