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Finding the Fourth Proportional to 2,830.80, 3,908.10 and 1,887.90

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Solution

The fourth proportional to 2,830.80, 3,908.10 and 1,887.90 is: 2,606.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.80 : 3,908.10 = 1,887.90 : x
  2. Step 2: Convert to fraction form
    2,830.80/3,908.10 = 1,887.90/x
  3. Step 3: Cross multiply
    2,830.80x = 3,908.10 × 1,887.90
  4. Step 4: Simplify right side
    2,830.80x = 7,378,101.99
  5. Step 5: Solve for x
    x = 7,378,101.99/2,830.80
  6. Step 6: Final answer
    x = 2,606.37

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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.