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Finding the Fourth Proportional to 451.21, 620.94 and 438.52

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Solution

The fourth proportional to 451.21, 620.94 and 438.52 is: 603.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.21 : 620.94 = 438.52 : x
  2. Step 2: Convert to fraction form
    451.21/620.94 = 438.52/x
  3. Step 3: Cross multiply
    451.21x = 620.94 × 438.52
  4. Step 4: Simplify right side
    451.21x = 272,294.61
  5. Step 5: Solve for x
    x = 272,294.61/451.21
  6. Step 6: Final answer
    x = 603.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.