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Finding the Fourth Proportional to 629.01, 942.87 and 455.25

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Solution

The fourth proportional to 629.01, 942.87 and 455.25 is: 682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.01 : 942.87 = 455.25 : x
  2. Step 2: Convert to fraction form
    629.01/942.87 = 455.25/x
  3. Step 3: Cross multiply
    629.01x = 942.87 × 455.25
  4. Step 4: Simplify right side
    629.01x = 429,235.01
  5. Step 5: Solve for x
    x = 429,235.01/629.01
  6. Step 6: Final answer
    x = 682.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.