Home / 1,139.67-1,572.75-845.37

Finding the Fourth Proportional to 1,139.67, 1,572.75 and 845.37

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Solution

The fourth proportional to 1,139.67, 1,572.75 and 845.37 is: 1,166.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,139.67 : 1,572.75 = 845.37 : x
  2. Step 2: Convert to fraction form
    1,139.67/1,572.75 = 845.37/x
  3. Step 3: Cross multiply
    1,139.67x = 1,572.75 × 845.37
  4. Step 4: Simplify right side
    1,139.67x = 1,329,555.67
  5. Step 5: Solve for x
    x = 1,329,555.67/1,139.67
  6. Step 6: Final answer
    x = 1,166.61

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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.