Home / 3,159.09-4,357.44-1,978.11

Finding the Fourth Proportional to 3,159.09, 4,357.44 and 1,978.11

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Solution

The fourth proportional to 3,159.09, 4,357.44 and 1,978.11 is: 2,728.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,159.09 : 4,357.44 = 1,978.11 : x
  2. Step 2: Convert to fraction form
    3,159.09/4,357.44 = 1,978.11/x
  3. Step 3: Cross multiply
    3,159.09x = 4,357.44 × 1,978.11
  4. Step 4: Simplify right side
    3,159.09x = 8,619,495.64
  5. Step 5: Solve for x
    x = 8,619,495.64/3,159.09
  6. Step 6: Final answer
    x = 2,728.47

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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.