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Finding the Fourth Proportional to 1,791.86, 2,688.82 and 751.77

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Solution

The fourth proportional to 1,791.86, 2,688.82 and 751.77 is: 1,128.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.86 : 2,688.82 = 751.77 : x
  2. Step 2: Convert to fraction form
    1,791.86/2,688.82 = 751.77/x
  3. Step 3: Cross multiply
    1,791.86x = 2,688.82 × 751.77
  4. Step 4: Simplify right side
    1,791.86x = 2,021,362.65
  5. Step 5: Solve for x
    x = 2,021,362.65/1,791.86
  6. Step 6: Final answer
    x = 1,128.08

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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.