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Finding the Fourth Proportional to 628.43, 868.11 and 536.18

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Solution

The fourth proportional to 628.43, 868.11 and 536.18 is: 740.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.43 : 868.11 = 536.18 : x
  2. Step 2: Convert to fraction form
    628.43/868.11 = 536.18/x
  3. Step 3: Cross multiply
    628.43x = 868.11 × 536.18
  4. Step 4: Simplify right side
    628.43x = 465,463.22
  5. Step 5: Solve for x
    x = 465,463.22/628.43
  6. Step 6: Final answer
    x = 740.68

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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.