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Finding the Fourth Proportional to 867.87, 1,197.18 and 536.13

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Solution

The fourth proportional to 867.87, 1,197.18 and 536.13 is: 739.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.87 : 1,197.18 = 536.13 : x
  2. Step 2: Convert to fraction form
    867.87/1,197.18 = 536.13/x
  3. Step 3: Cross multiply
    867.87x = 1,197.18 × 536.13
  4. Step 4: Simplify right side
    867.87x = 641,844.11
  5. Step 5: Solve for x
    x = 641,844.11/867.87
  6. Step 6: Final answer
    x = 739.56

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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.