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Finding the Fourth Proportional to 2,687.30, 4,029.99 and 955.58

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Solution

The fourth proportional to 2,687.30, 4,029.99 and 955.58 is: 1,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,687.30 : 4,029.99 = 955.58 : x
  2. Step 2: Convert to fraction form
    2,687.30/4,029.99 = 955.58/x
  3. Step 3: Cross multiply
    2,687.30x = 4,029.99 × 955.58
  4. Step 4: Simplify right side
    2,687.30x = 3,850,977.84
  5. Step 5: Solve for x
    x = 3,850,977.84/2,687.30
  6. Step 6: Final answer
    x = 1,433.03

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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.