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Finding the Fourth Proportional to 2,621.06, 3,931.80 and 673.26

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Solution

The fourth proportional to 2,621.06, 3,931.80 and 673.26 is: 1,009.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.06 : 3,931.80 = 673.26 : x
  2. Step 2: Convert to fraction form
    2,621.06/3,931.80 = 673.26/x
  3. Step 3: Cross multiply
    2,621.06x = 3,931.80 × 673.26
  4. Step 4: Simplify right side
    2,621.06x = 2,647,123.67
  5. Step 5: Solve for x
    x = 2,647,123.67/2,621.06
  6. Step 6: Final answer
    x = 1,009.94

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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.