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Finding the Fourth Proportional to 2,205.87, 3,308.81 and 745.03

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Solution

The fourth proportional to 2,205.87, 3,308.81 and 745.03 is: 1,117.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.87 : 3,308.81 = 745.03 : x
  2. Step 2: Convert to fraction form
    2,205.87/3,308.81 = 745.03/x
  3. Step 3: Cross multiply
    2,205.87x = 3,308.81 × 745.03
  4. Step 4: Simplify right side
    2,205.87x = 2,465,162.71
  5. Step 5: Solve for x
    x = 2,465,162.71/2,205.87
  6. Step 6: Final answer
    x = 1,117.55

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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.