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Finding the Fourth Proportional to 352.88, 528.50 and 280.78

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Solution

The fourth proportional to 352.88, 528.50 and 280.78 is: 420.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.88 : 528.50 = 280.78 : x
  2. Step 2: Convert to fraction form
    352.88/528.50 = 280.78/x
  3. Step 3: Cross multiply
    352.88x = 528.50 × 280.78
  4. Step 4: Simplify right side
    352.88x = 148,392.23
  5. Step 5: Solve for x
    x = 148,392.23/352.88
  6. Step 6: Final answer
    x = 420.52

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.