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Finding the Fourth Proportional to 745.73, 1,117.91 and 684.22

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Solution

The fourth proportional to 745.73, 1,117.91 and 684.22 is: 1,025.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.73 : 1,117.91 = 684.22 : x
  2. Step 2: Convert to fraction form
    745.73/1,117.91 = 684.22/x
  3. Step 3: Cross multiply
    745.73x = 1,117.91 × 684.22
  4. Step 4: Simplify right side
    745.73x = 764,887.37
  5. Step 5: Solve for x
    x = 764,887.37/745.73
  6. Step 6: Final answer
    x = 1,025.69

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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.