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Finding the Fourth Proportional to 419.37, 628.65 and 264.81

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Solution

The fourth proportional to 419.37, 628.65 and 264.81 is: 396.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.37 : 628.65 = 264.81 : x
  2. Step 2: Convert to fraction form
    419.37/628.65 = 264.81/x
  3. Step 3: Cross multiply
    419.37x = 628.65 × 264.81
  4. Step 4: Simplify right side
    419.37x = 166,472.81
  5. Step 5: Solve for x
    x = 166,472.81/419.37
  6. Step 6: Final answer
    x = 396.96

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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.