Home / 2,159-2,979.80-1,227.32

Finding the Fourth Proportional to 2,159, 2,979.80 and 1,227.32

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Solution

The fourth proportional to 2,159, 2,979.80 and 1,227.32 is: 1,693.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,159 : 2,979.80 = 1,227.32 : x
  2. Step 2: Convert to fraction form
    2,159/2,979.80 = 1,227.32/x
  3. Step 3: Cross multiply
    2,159x = 2,979.80 × 1,227.32
  4. Step 4: Simplify right side
    2,159x = 3,657,168.14
  5. Step 5: Solve for x
    x = 3,657,168.14/2,159
  6. Step 6: Final answer
    x = 1,693.92

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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.