Home / 2,631.78-3,629.66-1,970.20

Finding the Fourth Proportional to 2,631.78, 3,629.66 and 1,970.20

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Solution

The fourth proportional to 2,631.78, 3,629.66 and 1,970.20 is: 2,717.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.78 : 3,629.66 = 1,970.20 : x
  2. Step 2: Convert to fraction form
    2,631.78/3,629.66 = 1,970.20/x
  3. Step 3: Cross multiply
    2,631.78x = 3,629.66 × 1,970.20
  4. Step 4: Simplify right side
    2,631.78x = 7,151,156.13
  5. Step 5: Solve for x
    x = 7,151,156.13/2,631.78
  6. Step 6: Final answer
    x = 2,717.23

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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.