Home / 1,980.08-2,731.62-1,140.56

Finding the Fourth Proportional to 1,980.08, 2,731.62 and 1,140.56

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Solution

The fourth proportional to 1,980.08, 2,731.62 and 1,140.56 is: 1,573.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.08 : 2,731.62 = 1,140.56 : x
  2. Step 2: Convert to fraction form
    1,980.08/2,731.62 = 1,140.56/x
  3. Step 3: Cross multiply
    1,980.08x = 2,731.62 × 1,140.56
  4. Step 4: Simplify right side
    1,980.08x = 3,115,576.51
  5. Step 5: Solve for x
    x = 3,115,576.51/1,980.08
  6. Step 6: Final answer
    x = 1,573.46

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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.