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Finding the Fourth Proportional to 2,686.85, 4,030.56 and 739.07

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Solution

The fourth proportional to 2,686.85, 4,030.56 and 739.07 is: 1,108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,686.85 : 4,030.56 = 739.07 : x
  2. Step 2: Convert to fraction form
    2,686.85/4,030.56 = 739.07/x
  3. Step 3: Cross multiply
    2,686.85x = 4,030.56 × 739.07
  4. Step 4: Simplify right side
    2,686.85x = 2,978,865.98
  5. Step 5: Solve for x
    x = 2,978,865.98/2,686.85
  6. Step 6: Final answer
    x = 1,108.68

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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.