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Finding the Fourth Proportional to 2,992.65, 4,129.99 and 1,666.37

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Solution

The fourth proportional to 2,992.65, 4,129.99 and 1,666.37 is: 2,299.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,992.65 : 4,129.99 = 1,666.37 : x
  2. Step 2: Convert to fraction form
    2,992.65/4,129.99 = 1,666.37/x
  3. Step 3: Cross multiply
    2,992.65x = 4,129.99 × 1,666.37
  4. Step 4: Simplify right side
    2,992.65x = 6,882,097.60
  5. Step 5: Solve for x
    x = 6,882,097.60/2,992.65
  6. Step 6: Final answer
    x = 2,299.67

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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.