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Finding the Fourth Proportional to 1,818.86, 2,728.28 and 648.81

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Solution

The fourth proportional to 1,818.86, 2,728.28 and 648.81 is: 973.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.86 : 2,728.28 = 648.81 : x
  2. Step 2: Convert to fraction form
    1,818.86/2,728.28 = 648.81/x
  3. Step 3: Cross multiply
    1,818.86x = 2,728.28 × 648.81
  4. Step 4: Simplify right side
    1,818.86x = 1,770,136.97
  5. Step 5: Solve for x
    x = 1,770,136.97/1,818.86
  6. Step 6: Final answer
    x = 973.22

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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.