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Finding the Fourth Proportional to 420.49, 629.37 and 362.17

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Solution

The fourth proportional to 420.49, 629.37 and 362.17 is: 542.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.49 : 629.37 = 362.17 : x
  2. Step 2: Convert to fraction form
    420.49/629.37 = 362.17/x
  3. Step 3: Cross multiply
    420.49x = 629.37 × 362.17
  4. Step 4: Simplify right side
    420.49x = 227,939.72
  5. Step 5: Solve for x
    x = 227,939.72/420.49
  6. Step 6: Final answer
    x = 542.08

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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.