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Finding the Fourth Proportional to 1,666.10, 2,497.19 and 1,253.90

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Solution

The fourth proportional to 1,666.10, 2,497.19 and 1,253.90 is: 1,879.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,666.10 : 2,497.19 = 1,253.90 : x
  2. Step 2: Convert to fraction form
    1,666.10/2,497.19 = 1,253.90/x
  3. Step 3: Cross multiply
    1,666.10x = 2,497.19 × 1,253.90
  4. Step 4: Simplify right side
    1,666.10x = 3,131,226.54
  5. Step 5: Solve for x
    x = 3,131,226.54/1,666.10
  6. Step 6: Final answer
    x = 1,879.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.