Home / 1,979.75-2,731.79-1,140.14

Finding the Fourth Proportional to 1,979.75, 2,731.79 and 1,140.14

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Solution

The fourth proportional to 1,979.75, 2,731.79 and 1,140.14 is: 1,573.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.75 : 2,731.79 = 1,140.14 : x
  2. Step 2: Convert to fraction form
    1,979.75/2,731.79 = 1,140.14/x
  3. Step 3: Cross multiply
    1,979.75x = 2,731.79 × 1,140.14
  4. Step 4: Simplify right side
    1,979.75x = 3,114,617.35
  5. Step 5: Solve for x
    x = 3,114,617.35/1,979.75
  6. Step 6: Final answer
    x = 1,573.24

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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.