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Finding the Fourth Proportional to 2,686.41, 4,029.66 and 738.63

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Solution

The fourth proportional to 2,686.41, 4,029.66 and 738.63 is: 1,107.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.41 : 4,029.66 = 738.63 : x
  2. Step 2: Convert to fraction form
    2,686.41/4,029.66 = 738.63/x
  3. Step 3: Cross multiply
    2,686.41x = 4,029.66 × 738.63
  4. Step 4: Simplify right side
    2,686.41x = 2,976,427.77
  5. Step 5: Solve for x
    x = 2,976,427.77/2,686.41
  6. Step 6: Final answer
    x = 1,107.96

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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.