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Finding the Fourth Proportional to 5,484.89, 8,220.18 and 4,789.91

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Solution

The fourth proportional to 5,484.89, 8,220.18 and 4,789.91 is: 7,178.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,484.89 : 8,220.18 = 4,789.91 : x
  2. Step 2: Convert to fraction form
    5,484.89/8,220.18 = 4,789.91/x
  3. Step 3: Cross multiply
    5,484.89x = 8,220.18 × 4,789.91
  4. Step 4: Simplify right side
    5,484.89x = 39,373,922.38
  5. Step 5: Solve for x
    x = 39,373,922.38/5,484.89
  6. Step 6: Final answer
    x = 7,178.62

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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.