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Finding the Fourth Proportional to 3,209.88, 4,807.80 and 1,908.48

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Solution

The fourth proportional to 3,209.88, 4,807.80 and 1,908.48 is: 2,858.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,209.88 : 4,807.80 = 1,908.48 : x
  2. Step 2: Convert to fraction form
    3,209.88/4,807.80 = 1,908.48/x
  3. Step 3: Cross multiply
    3,209.88x = 4,807.80 × 1,908.48
  4. Step 4: Simplify right side
    3,209.88x = 9,175,590.14
  5. Step 5: Solve for x
    x = 9,175,590.14/3,209.88
  6. Step 6: Final answer
    x = 2,858.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.