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Finding the Fourth Proportional to 421.96, 629.67 and 373.36

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Solution

The fourth proportional to 421.96, 629.67 and 373.36 is: 557.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.96 : 629.67 = 373.36 : x
  2. Step 2: Convert to fraction form
    421.96/629.67 = 373.36/x
  3. Step 3: Cross multiply
    421.96x = 629.67 × 373.36
  4. Step 4: Simplify right side
    421.96x = 235,093.59
  5. Step 5: Solve for x
    x = 235,093.59/421.96
  6. Step 6: Final answer
    x = 557.15

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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.