Home / 1,979.53-2,731.69-1,140.21

Finding the Fourth Proportional to 1,979.53, 2,731.69 and 1,140.21

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Solution

The fourth proportional to 1,979.53, 2,731.69 and 1,140.21 is: 1,573.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.53 : 2,731.69 = 1,140.21 : x
  2. Step 2: Convert to fraction form
    1,979.53/2,731.69 = 1,140.21/x
  3. Step 3: Cross multiply
    1,979.53x = 2,731.69 × 1,140.21
  4. Step 4: Simplify right side
    1,979.53x = 3,114,700.25
  5. Step 5: Solve for x
    x = 3,114,700.25/1,979.53
  6. Step 6: Final answer
    x = 1,573.45

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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.