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Finding the Fourth Proportional to 629.81, 939.69 and 563.75

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Solution

The fourth proportional to 629.81, 939.69 and 563.75 is: 841.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.81 : 939.69 = 563.75 : x
  2. Step 2: Convert to fraction form
    629.81/939.69 = 563.75/x
  3. Step 3: Cross multiply
    629.81x = 939.69 × 563.75
  4. Step 4: Simplify right side
    629.81x = 529,745.54
  5. Step 5: Solve for x
    x = 529,745.54/629.81
  6. Step 6: Final answer
    x = 841.13

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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.