Home / 1,979.63-2,731.39-1,140.58

Finding the Fourth Proportional to 1,979.63, 2,731.39 and 1,140.58

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Solution

The fourth proportional to 1,979.63, 2,731.39 and 1,140.58 is: 1,573.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.63 : 2,731.39 = 1,140.58 : x
  2. Step 2: Convert to fraction form
    1,979.63/2,731.39 = 1,140.58/x
  3. Step 3: Cross multiply
    1,979.63x = 2,731.39 × 1,140.58
  4. Step 4: Simplify right side
    1,979.63x = 3,115,368.81
  5. Step 5: Solve for x
    x = 3,115,368.81/1,979.63
  6. Step 6: Final answer
    x = 1,573.71

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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.