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Finding the Fourth Proportional to 3,480.75, 4,803.45 and 1,908.90

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Solution

The fourth proportional to 3,480.75, 4,803.45 and 1,908.90 is: 2,634.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,480.75 : 4,803.45 = 1,908.90 : x
  2. Step 2: Convert to fraction form
    3,480.75/4,803.45 = 1,908.90/x
  3. Step 3: Cross multiply
    3,480.75x = 4,803.45 × 1,908.90
  4. Step 4: Simplify right side
    3,480.75x = 9,169,305.71
  5. Step 5: Solve for x
    x = 9,169,305.71/3,480.75
  6. Step 6: Final answer
    x = 2,634.29

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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.