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Finding the Fourth Proportional to 2,579.37, 3,869.90 and 824.67

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Solution

The fourth proportional to 2,579.37, 3,869.90 and 824.67 is: 1,237.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,579.37 : 3,869.90 = 824.67 : x
  2. Step 2: Convert to fraction form
    2,579.37/3,869.90 = 824.67/x
  3. Step 3: Cross multiply
    2,579.37x = 3,869.90 × 824.67
  4. Step 4: Simplify right side
    2,579.37x = 3,191,390.43
  5. Step 5: Solve for x
    x = 3,191,390.43/2,579.37
  6. Step 6: Final answer
    x = 1,237.28

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1.5x scale

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.