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Finding the Fourth Proportional to 2,212.15, 3,317.64 and 751

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Solution

The fourth proportional to 2,212.15, 3,317.64 and 751 is: 1,126.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,212.15 : 3,317.64 = 751 : x
  2. Step 2: Convert to fraction form
    2,212.15/3,317.64 = 751/x
  3. Step 3: Cross multiply
    2,212.15x = 3,317.64 × 751
  4. Step 4: Simplify right side
    2,212.15x = 2,491,547.64
  5. Step 5: Solve for x
    x = 2,491,547.64/2,212.15
  6. Step 6: Final answer
    x = 1,126.30

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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.