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Finding the Fourth Proportional to 539.92, 809.28 and 265.60

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Solution

The fourth proportional to 539.92, 809.28 and 265.60 is: 398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539.92 : 809.28 = 265.60 : x
  2. Step 2: Convert to fraction form
    539.92/809.28 = 265.60/x
  3. Step 3: Cross multiply
    539.92x = 809.28 × 265.60
  4. Step 4: Simplify right side
    539.92x = 214,944.77
  5. Step 5: Solve for x
    x = 214,944.77/539.92
  6. Step 6: Final answer
    x = 398.10

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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.