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Finding the Fourth Proportional to 868.19, 1,198.14 and 536.36

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Solution

The fourth proportional to 868.19, 1,198.14 and 536.36 is: 740.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.19 : 1,198.14 = 536.36 : x
  2. Step 2: Convert to fraction form
    868.19/1,198.14 = 536.36/x
  3. Step 3: Cross multiply
    868.19x = 1,198.14 × 536.36
  4. Step 4: Simplify right side
    868.19x = 642,634.37
  5. Step 5: Solve for x
    x = 642,634.37/868.19
  6. Step 6: Final answer
    x = 740.20

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Double scale
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1.5x scale

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.