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Finding the Fourth Proportional to 427.52, 589.20 and 408.08

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Solution

The fourth proportional to 427.52, 589.20 and 408.08 is: 562.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.52 : 589.20 = 408.08 : x
  2. Step 2: Convert to fraction form
    427.52/589.20 = 408.08/x
  3. Step 3: Cross multiply
    427.52x = 589.20 × 408.08
  4. Step 4: Simplify right side
    427.52x = 240,440.74
  5. Step 5: Solve for x
    x = 240,440.74/427.52
  6. Step 6: Final answer
    x = 562.41

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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.