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Finding the Fourth Proportional to 629.04, 868.05 and 380.46

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Solution

The fourth proportional to 629.04, 868.05 and 380.46 is: 525.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.04 : 868.05 = 380.46 : x
  2. Step 2: Convert to fraction form
    629.04/868.05 = 380.46/x
  3. Step 3: Cross multiply
    629.04x = 868.05 × 380.46
  4. Step 4: Simplify right side
    629.04x = 330,258.30
  5. Step 5: Solve for x
    x = 330,258.30/629.04
  6. Step 6: Final answer
    x = 525.02

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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.