Home / 5,278.88-7,919.40-1,815.68

Finding the Fourth Proportional to 5,278.88, 7,919.40 and 1,815.68

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Solution

The fourth proportional to 5,278.88, 7,919.40 and 1,815.68 is: 2,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.88 : 7,919.40 = 1,815.68 : x
  2. Step 2: Convert to fraction form
    5,278.88/7,919.40 = 1,815.68/x
  3. Step 3: Cross multiply
    5,278.88x = 7,919.40 × 1,815.68
  4. Step 4: Simplify right side
    5,278.88x = 14,379,096.19
  5. Step 5: Solve for x
    x = 14,379,096.19/5,278.88
  6. Step 6: Final answer
    x = 2,723.89

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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.