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Finding the Fourth Proportional to 1,791.90, 2,688.03 and 751.71

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Solution

The fourth proportional to 1,791.90, 2,688.03 and 751.71 is: 1,127.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.90 : 2,688.03 = 751.71 : x
  2. Step 2: Convert to fraction form
    1,791.90/2,688.03 = 751.71/x
  3. Step 3: Cross multiply
    1,791.90x = 2,688.03 × 751.71
  4. Step 4: Simplify right side
    1,791.90x = 2,020,619.03
  5. Step 5: Solve for x
    x = 2,020,619.03/1,791.90
  6. Step 6: Final answer
    x = 1,127.64

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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.