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Finding the Fourth Proportional to 1,297.70, 1,791.04 and 773.83

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Solution

The fourth proportional to 1,297.70, 1,791.04 and 773.83 is: 1,068.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.70 : 1,791.04 = 773.83 : x
  2. Step 2: Convert to fraction form
    1,297.70/1,791.04 = 773.83/x
  3. Step 3: Cross multiply
    1,297.70x = 1,791.04 × 773.83
  4. Step 4: Simplify right side
    1,297.70x = 1,385,960.48
  5. Step 5: Solve for x
    x = 1,385,960.48/1,297.70
  6. Step 6: Final answer
    x = 1,068.01

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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.