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Finding the Fourth Proportional to 982.72, 1,356.17 and 540.65

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Solution

The fourth proportional to 982.72, 1,356.17 and 540.65 is: 746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    982.72 : 1,356.17 = 540.65 : x
  2. Step 2: Convert to fraction form
    982.72/1,356.17 = 540.65/x
  3. Step 3: Cross multiply
    982.72x = 1,356.17 × 540.65
  4. Step 4: Simplify right side
    982.72x = 733,206.53
  5. Step 5: Solve for x
    x = 733,206.53/982.72
  6. Step 6: Final answer
    x = 746.10

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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.