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Finding the Fourth Proportional to 1,956.25, 2,699.70 and 1,072.09

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Solution

The fourth proportional to 1,956.25, 2,699.70 and 1,072.09 is: 1,479.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.25 : 2,699.70 = 1,072.09 : x
  2. Step 2: Convert to fraction form
    1,956.25/2,699.70 = 1,072.09/x
  3. Step 3: Cross multiply
    1,956.25x = 2,699.70 × 1,072.09
  4. Step 4: Simplify right side
    1,956.25x = 2,894,314.59
  5. Step 5: Solve for x
    x = 2,894,314.59/1,956.25
  6. Step 6: Final answer
    x = 1,479.52

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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.