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Finding the Fourth Proportional to 629.99, 869.38 and 350.21

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Solution

The fourth proportional to 629.99, 869.38 and 350.21 is: 483.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.99 : 869.38 = 350.21 : x
  2. Step 2: Convert to fraction form
    629.99/869.38 = 350.21/x
  3. Step 3: Cross multiply
    629.99x = 869.38 × 350.21
  4. Step 4: Simplify right side
    629.99x = 304,466.22
  5. Step 5: Solve for x
    x = 304,466.22/629.99
  6. Step 6: Final answer
    x = 483.29

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1.5x scale

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.