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Finding the Fourth Proportional to 2,866.65, 3,956.09 and 1,858.58

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Solution

The fourth proportional to 2,866.65, 3,956.09 and 1,858.58 is: 2,564.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.65 : 3,956.09 = 1,858.58 : x
  2. Step 2: Convert to fraction form
    2,866.65/3,956.09 = 1,858.58/x
  3. Step 3: Cross multiply
    2,866.65x = 3,956.09 × 1,858.58
  4. Step 4: Simplify right side
    2,866.65x = 7,352,709.75
  5. Step 5: Solve for x
    x = 7,352,709.75/2,866.65
  6. Step 6: Final answer
    x = 2,564.91

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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.