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Finding the Fourth Proportional to 2,690.63, 3,713.10 and 1,628.42

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Solution

The fourth proportional to 2,690.63, 3,713.10 and 1,628.42 is: 2,247.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.63 : 3,713.10 = 1,628.42 : x
  2. Step 2: Convert to fraction form
    2,690.63/3,713.10 = 1,628.42/x
  3. Step 3: Cross multiply
    2,690.63x = 3,713.10 × 1,628.42
  4. Step 4: Simplify right side
    2,690.63x = 6,046,467.74
  5. Step 5: Solve for x
    x = 6,046,467.74/2,690.63
  6. Step 6: Final answer
    x = 2,247.24

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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.