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Finding the Fourth Proportional to 5,479.80, 8,207.55 and 4,750.80

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Solution

The fourth proportional to 5,479.80, 8,207.55 and 4,750.80 is: 7,115.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,479.80 : 8,207.55 = 4,750.80 : x
  2. Step 2: Convert to fraction form
    5,479.80/8,207.55 = 4,750.80/x
  3. Step 3: Cross multiply
    5,479.80x = 8,207.55 × 4,750.80
  4. Step 4: Simplify right side
    5,479.80x = 38,992,428.54
  5. Step 5: Solve for x
    x = 38,992,428.54/5,479.80
  6. Step 6: Final answer
    x = 7,115.67

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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.