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Finding the Fourth Proportional to 2,579, 3,869.16 and 847.64

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Solution

The fourth proportional to 2,579, 3,869.16 and 847.64 is: 1,271.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579 : 3,869.16 = 847.64 : x
  2. Step 2: Convert to fraction form
    2,579/3,869.16 = 847.64/x
  3. Step 3: Cross multiply
    2,579x = 3,869.16 × 847.64
  4. Step 4: Simplify right side
    2,579x = 3,279,654.78
  5. Step 5: Solve for x
    x = 3,279,654.78/2,579
  6. Step 6: Final answer
    x = 1,271.68

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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.