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Finding the Fourth Proportional to 628.93, 868.01 and 380.26

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Solution

The fourth proportional to 628.93, 868.01 and 380.26 is: 524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.93 : 868.01 = 380.26 : x
  2. Step 2: Convert to fraction form
    628.93/868.01 = 380.26/x
  3. Step 3: Cross multiply
    628.93x = 868.01 × 380.26
  4. Step 4: Simplify right side
    628.93x = 330,069.48
  5. Step 5: Solve for x
    x = 330,069.48/628.93
  6. Step 6: Final answer
    x = 524.81

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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.