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Finding the Fourth Proportional to 2,713.87, 4,070.79 and 766.07

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Solution

The fourth proportional to 2,713.87, 4,070.79 and 766.07 is: 1,149.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,713.87 : 4,070.79 = 766.07 : x
  2. Step 2: Convert to fraction form
    2,713.87/4,070.79 = 766.07/x
  3. Step 3: Cross multiply
    2,713.87x = 4,070.79 × 766.07
  4. Step 4: Simplify right side
    2,713.87x = 3,118,489.74
  5. Step 5: Solve for x
    x = 3,118,489.74/2,713.87
  6. Step 6: Final answer
    x = 1,149.09

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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.