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Finding the Fourth Proportional to 629.20, 938.75 and 559.90

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Solution

The fourth proportional to 629.20, 938.75 and 559.90 is: 835.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.20 : 938.75 = 559.90 : x
  2. Step 2: Convert to fraction form
    629.20/938.75 = 559.90/x
  3. Step 3: Cross multiply
    629.20x = 938.75 × 559.90
  4. Step 4: Simplify right side
    629.20x = 525,606.13
  5. Step 5: Solve for x
    x = 525,606.13/629.20
  6. Step 6: Final answer
    x = 835.36

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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.