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Finding the Fourth Proportional to 1,484.86, 2,049.11 and 821.73

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Solution

The fourth proportional to 1,484.86, 2,049.11 and 821.73 is: 1,133.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.86 : 2,049.11 = 821.73 : x
  2. Step 2: Convert to fraction form
    1,484.86/2,049.11 = 821.73/x
  3. Step 3: Cross multiply
    1,484.86x = 2,049.11 × 821.73
  4. Step 4: Simplify right side
    1,484.86x = 1,683,815.16
  5. Step 5: Solve for x
    x = 1,683,815.16/1,484.86
  6. Step 6: Final answer
    x = 1,133.99

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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.