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Finding the Fourth Proportional to 3,159.53, 4,739.79 and 1,079.64

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Solution

The fourth proportional to 3,159.53, 4,739.79 and 1,079.64 is: 1,619.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,159.53 : 4,739.79 = 1,079.64 : x
  2. Step 2: Convert to fraction form
    3,159.53/4,739.79 = 1,079.64/x
  3. Step 3: Cross multiply
    3,159.53x = 4,739.79 × 1,079.64
  4. Step 4: Simplify right side
    3,159.53x = 5,117,266.88
  5. Step 5: Solve for x
    x = 5,117,266.88/3,159.53
  6. Step 6: Final answer
    x = 1,619.63

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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.