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Finding the Fourth Proportional to 535.52, 739.56 and 418.88

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Solution

The fourth proportional to 535.52, 739.56 and 418.88 is: 578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.52 : 739.56 = 418.88 : x
  2. Step 2: Convert to fraction form
    535.52/739.56 = 418.88/x
  3. Step 3: Cross multiply
    535.52x = 739.56 × 418.88
  4. Step 4: Simplify right side
    535.52x = 309,783.20
  5. Step 5: Solve for x
    x = 309,783.20/535.52
  6. Step 6: Final answer
    x = 578.48

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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.