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Finding the Fourth Proportional to 629.52, 869.03 and 420.04

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Solution

The fourth proportional to 629.52, 869.03 and 420.04 is: 579.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.52 : 869.03 = 420.04 : x
  2. Step 2: Convert to fraction form
    629.52/869.03 = 420.04/x
  3. Step 3: Cross multiply
    629.52x = 869.03 × 420.04
  4. Step 4: Simplify right side
    629.52x = 365,027.36
  5. Step 5: Solve for x
    x = 365,027.36/629.52
  6. Step 6: Final answer
    x = 579.85

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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.