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Finding the Fourth Proportional to 982.47, 1,355.80 and 540.37

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Solution

The fourth proportional to 982.47, 1,355.80 and 540.37 is: 745.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.47 : 1,355.80 = 540.37 : x
  2. Step 2: Convert to fraction form
    982.47/1,355.80 = 540.37/x
  3. Step 3: Cross multiply
    982.47x = 1,355.80 × 540.37
  4. Step 4: Simplify right side
    982.47x = 732,633.65
  5. Step 5: Solve for x
    x = 732,633.65/982.47
  6. Step 6: Final answer
    x = 745.71

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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.