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Finding the Fourth Proportional to 982.74, 1,356.10 and 540.55

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Solution

The fourth proportional to 982.74, 1,356.10 and 540.55 is: 745.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.74 : 1,356.10 = 540.55 : x
  2. Step 2: Convert to fraction form
    982.74/1,356.10 = 540.55/x
  3. Step 3: Cross multiply
    982.74x = 1,356.10 × 540.55
  4. Step 4: Simplify right side
    982.74x = 733,039.86
  5. Step 5: Solve for x
    x = 733,039.86/982.74
  6. Step 6: Final answer
    x = 745.91

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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.