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Finding the Fourth Proportional to 438.93, 605.93 and 281.79

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Solution

The fourth proportional to 438.93, 605.93 and 281.79 is: 389.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.93 : 605.93 = 281.79 : x
  2. Step 2: Convert to fraction form
    438.93/605.93 = 281.79/x
  3. Step 3: Cross multiply
    438.93x = 605.93 × 281.79
  4. Step 4: Simplify right side
    438.93x = 170,745.01
  5. Step 5: Solve for x
    x = 170,745.01/438.93
  6. Step 6: Final answer
    x = 389.00

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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.