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Finding the Fourth Proportional to 629.30, 939.36 and 577.37

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Solution

The fourth proportional to 629.30, 939.36 and 577.37 is: 861.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.30 : 939.36 = 577.37 : x
  2. Step 2: Convert to fraction form
    629.30/939.36 = 577.37/x
  3. Step 3: Cross multiply
    629.30x = 939.36 × 577.37
  4. Step 4: Simplify right side
    629.30x = 542,353.59
  5. Step 5: Solve for x
    x = 542,353.59/629.30
  6. Step 6: Final answer
    x = 861.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.