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Finding the Fourth Proportional to 628.53, 863.89 and 554.41

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Solution

The fourth proportional to 628.53, 863.89 and 554.41 is: 762.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.53 : 863.89 = 554.41 : x
  2. Step 2: Convert to fraction form
    628.53/863.89 = 554.41/x
  3. Step 3: Cross multiply
    628.53x = 863.89 × 554.41
  4. Step 4: Simplify right side
    628.53x = 478,949.25
  5. Step 5: Solve for x
    x = 478,949.25/628.53
  6. Step 6: Final answer
    x = 762.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.