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Finding the Fourth Proportional to 2,203.55, 3,040.91 and 1,208.91

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Solution

The fourth proportional to 2,203.55, 3,040.91 and 1,208.91 is: 1,668.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,203.55 : 3,040.91 = 1,208.91 : x
  2. Step 2: Convert to fraction form
    2,203.55/3,040.91 = 1,208.91/x
  3. Step 3: Cross multiply
    2,203.55x = 3,040.91 × 1,208.91
  4. Step 4: Simplify right side
    2,203.55x = 3,676,186.51
  5. Step 5: Solve for x
    x = 3,676,186.51/2,203.55
  6. Step 6: Final answer
    x = 1,668.30

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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.