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Finding the Fourth Proportional to 1,297.79, 1,791 and 800.04

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Solution

The fourth proportional to 1,297.79, 1,791 and 800.04 is: 1,104.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.79 : 1,791 = 800.04 : x
  2. Step 2: Convert to fraction form
    1,297.79/1,791 = 800.04/x
  3. Step 3: Cross multiply
    1,297.79x = 1,791 × 800.04
  4. Step 4: Simplify right side
    1,297.79x = 1,432,871.64
  5. Step 5: Solve for x
    x = 1,432,871.64/1,297.79
  6. Step 6: Final answer
    x = 1,104.09

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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.