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Finding the Fourth Proportional to 421.25, 630.38 and 364.19

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Solution

The fourth proportional to 421.25, 630.38 and 364.19 is: 544.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.25 : 630.38 = 364.19 : x
  2. Step 2: Convert to fraction form
    421.25/630.38 = 364.19/x
  3. Step 3: Cross multiply
    421.25x = 630.38 × 364.19
  4. Step 4: Simplify right side
    421.25x = 229,575.85
  5. Step 5: Solve for x
    x = 229,575.85/421.25
  6. Step 6: Final answer
    x = 544.99

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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.