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Finding the Fourth Proportional to 1,996.87, 2,755.02 and 1,210.63

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Solution

The fourth proportional to 1,996.87, 2,755.02 and 1,210.63 is: 1,670.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,996.87 : 2,755.02 = 1,210.63 : x
  2. Step 2: Convert to fraction form
    1,996.87/2,755.02 = 1,210.63/x
  3. Step 3: Cross multiply
    1,996.87x = 2,755.02 × 1,210.63
  4. Step 4: Simplify right side
    1,996.87x = 3,335,307.51
  5. Step 5: Solve for x
    x = 3,335,307.51/1,996.87
  6. Step 6: Final answer
    x = 1,670.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.