Home / 1,979.91-2,731.62-1,140.31

Finding the Fourth Proportional to 1,979.91, 2,731.62 and 1,140.31

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Solution

The fourth proportional to 1,979.91, 2,731.62 and 1,140.31 is: 1,573.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.91 : 2,731.62 = 1,140.31 : x
  2. Step 2: Convert to fraction form
    1,979.91/2,731.62 = 1,140.31/x
  3. Step 3: Cross multiply
    1,979.91x = 2,731.62 × 1,140.31
  4. Step 4: Simplify right side
    1,979.91x = 3,114,901.29
  5. Step 5: Solve for x
    x = 3,114,901.29/1,979.91
  6. Step 6: Final answer
    x = 1,573.25

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1.5x scale

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.