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Finding the Fourth Proportional to 868.21, 1,197.41 and 536.31

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Solution

The fourth proportional to 868.21, 1,197.41 and 536.31 is: 739.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.21 : 1,197.41 = 536.31 : x
  2. Step 2: Convert to fraction form
    868.21/1,197.41 = 536.31/x
  3. Step 3: Cross multiply
    868.21x = 1,197.41 × 536.31
  4. Step 4: Simplify right side
    868.21x = 642,180.28
  5. Step 5: Solve for x
    x = 642,180.28/868.21
  6. Step 6: Final answer
    x = 739.66

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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.