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Finding the Fourth Proportional to 4,145.40, 6,201.90 and 2,687.40

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Solution

The fourth proportional to 4,145.40, 6,201.90 and 2,687.40 is: 4,020.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,145.40 : 6,201.90 = 2,687.40 : x
  2. Step 2: Convert to fraction form
    4,145.40/6,201.90 = 2,687.40/x
  3. Step 3: Cross multiply
    4,145.40x = 6,201.90 × 2,687.40
  4. Step 4: Simplify right side
    4,145.40x = 16,666,986.06
  5. Step 5: Solve for x
    x = 16,666,986.06/4,145.40
  6. Step 6: Final answer
    x = 4,020.60

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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.