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Finding the Fourth Proportional to 531.54, 734.22 and 438.66

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Solution

The fourth proportional to 531.54, 734.22 and 438.66 is: 605.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.54 : 734.22 = 438.66 : x
  2. Step 2: Convert to fraction form
    531.54/734.22 = 438.66/x
  3. Step 3: Cross multiply
    531.54x = 734.22 × 438.66
  4. Step 4: Simplify right side
    531.54x = 322,072.95
  5. Step 5: Solve for x
    x = 322,072.95/531.54
  6. Step 6: Final answer
    x = 605.92

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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.