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Finding the Fourth Proportional to 2,668.80, 4,002.48 and 1,808.40

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Solution

The fourth proportional to 2,668.80, 4,002.48 and 1,808.40 is: 2,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.80 : 4,002.48 = 1,808.40 : x
  2. Step 2: Convert to fraction form
    2,668.80/4,002.48 = 1,808.40/x
  3. Step 3: Cross multiply
    2,668.80x = 4,002.48 × 1,808.40
  4. Step 4: Simplify right side
    2,668.80x = 7,238,084.83
  5. Step 5: Solve for x
    x = 7,238,084.83/2,668.80
  6. Step 6: Final answer
    x = 2,712.11

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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.