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Finding the Fourth Proportional to 578.28, 798.27 and 438.42

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Solution

The fourth proportional to 578.28, 798.27 and 438.42 is: 605.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.28 : 798.27 = 438.42 : x
  2. Step 2: Convert to fraction form
    578.28/798.27 = 438.42/x
  3. Step 3: Cross multiply
    578.28x = 798.27 × 438.42
  4. Step 4: Simplify right side
    578.28x = 349,977.53
  5. Step 5: Solve for x
    x = 349,977.53/578.28
  6. Step 6: Final answer
    x = 605.20

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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.