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Finding the Fourth Proportional to 420.24, 629.41 and 362

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Solution

The fourth proportional to 420.24, 629.41 and 362 is: 542.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.24 : 629.41 = 362 : x
  2. Step 2: Convert to fraction form
    420.24/629.41 = 362/x
  3. Step 3: Cross multiply
    420.24x = 629.41 × 362
  4. Step 4: Simplify right side
    420.24x = 227,846.42
  5. Step 5: Solve for x
    x = 227,846.42/420.24
  6. Step 6: Final answer
    x = 542.18

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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.