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Finding the Fourth Proportional to 2,762, 3,811.58 and 1,520

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Solution

The fourth proportional to 2,762, 3,811.58 and 1,520 is: 2,097.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,762 : 3,811.58 = 1,520 : x
  2. Step 2: Convert to fraction form
    2,762/3,811.58 = 1,520/x
  3. Step 3: Cross multiply
    2,762x = 3,811.58 × 1,520
  4. Step 4: Simplify right side
    2,762x = 5,793,601.60
  5. Step 5: Solve for x
    x = 5,793,601.60/2,762
  6. Step 6: Final answer
    x = 2,097.61

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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.