Home / 2,819.51-3,889.10-1,935.80

Finding the Fourth Proportional to 2,819.51, 3,889.10 and 1,935.80

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Solution

The fourth proportional to 2,819.51, 3,889.10 and 1,935.80 is: 2,670.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.51 : 3,889.10 = 1,935.80 : x
  2. Step 2: Convert to fraction form
    2,819.51/3,889.10 = 1,935.80/x
  3. Step 3: Cross multiply
    2,819.51x = 3,889.10 × 1,935.80
  4. Step 4: Simplify right side
    2,819.51x = 7,528,505.17
  5. Step 5: Solve for x
    x = 7,528,505.17/2,819.51
  6. Step 6: Final answer
    x = 2,670.15

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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.