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Finding the Fourth Proportional to 2,137.81, 3,207.21 and 751.18

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Solution

The fourth proportional to 2,137.81, 3,207.21 and 751.18 is: 1,126.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.81 : 3,207.21 = 751.18 : x
  2. Step 2: Convert to fraction form
    2,137.81/3,207.21 = 751.18/x
  3. Step 3: Cross multiply
    2,137.81x = 3,207.21 × 751.18
  4. Step 4: Simplify right side
    2,137.81x = 2,409,192.01
  5. Step 5: Solve for x
    x = 2,409,192.01/2,137.81
  6. Step 6: Final answer
    x = 1,126.94

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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.