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Finding the Fourth Proportional to 438.83, 605.33 and 279.02

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Solution

The fourth proportional to 438.83, 605.33 and 279.02 is: 384.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.83 : 605.33 = 279.02 : x
  2. Step 2: Convert to fraction form
    438.83/605.33 = 279.02/x
  3. Step 3: Cross multiply
    438.83x = 605.33 × 279.02
  4. Step 4: Simplify right side
    438.83x = 168,896.15
  5. Step 5: Solve for x
    x = 168,896.15/438.83
  6. Step 6: Final answer
    x = 384.88

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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.