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Finding the Fourth Proportional to 2,686.19, 4,029.42 and 738.54

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Solution

The fourth proportional to 2,686.19, 4,029.42 and 738.54 is: 1,107.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.19 : 4,029.42 = 738.54 : x
  2. Step 2: Convert to fraction form
    2,686.19/4,029.42 = 738.54/x
  3. Step 3: Cross multiply
    2,686.19x = 4,029.42 × 738.54
  4. Step 4: Simplify right side
    2,686.19x = 2,975,887.85
  5. Step 5: Solve for x
    x = 2,975,887.85/2,686.19
  6. Step 6: Final answer
    x = 1,107.85

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1.5x scale

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.