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Finding the Fourth Proportional to 2,908, 4,013.10 and 1,666

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Solution

The fourth proportional to 2,908, 4,013.10 and 1,666 is: 2,299.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,908 : 4,013.10 = 1,666 : x
  2. Step 2: Convert to fraction form
    2,908/4,013.10 = 1,666/x
  3. Step 3: Cross multiply
    2,908x = 4,013.10 × 1,666
  4. Step 4: Simplify right side
    2,908x = 6,685,824.60
  5. Step 5: Solve for x
    x = 6,685,824.60/2,908
  6. Step 6: Final answer
    x = 2,299.11

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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.