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Finding the Fourth Proportional to 438.32, 605.01 and 272.45

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Solution

The fourth proportional to 438.32, 605.01 and 272.45 is: 376.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.32 : 605.01 = 272.45 : x
  2. Step 2: Convert to fraction form
    438.32/605.01 = 272.45/x
  3. Step 3: Cross multiply
    438.32x = 605.01 × 272.45
  4. Step 4: Simplify right side
    438.32x = 164,834.97
  5. Step 5: Solve for x
    x = 164,834.97/438.32
  6. Step 6: Final answer
    x = 376.06

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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.