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Finding the Fourth Proportional to 2,888.72, 3,986.42 and 1,629.79

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Solution

The fourth proportional to 2,888.72, 3,986.42 and 1,629.79 is: 2,249.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,888.72 : 3,986.42 = 1,629.79 : x
  2. Step 2: Convert to fraction form
    2,888.72/3,986.42 = 1,629.79/x
  3. Step 3: Cross multiply
    2,888.72x = 3,986.42 × 1,629.79
  4. Step 4: Simplify right side
    2,888.72x = 6,497,018.50
  5. Step 5: Solve for x
    x = 6,497,018.50/2,888.72
  6. Step 6: Final answer
    x = 2,249.10

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1.5x scale

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.