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Finding the Fourth Proportional to 545, 816.96 and 255.92

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Solution

The fourth proportional to 545, 816.96 and 255.92 is: 383.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    545 : 816.96 = 255.92 : x
  2. Step 2: Convert to fraction form
    545/816.96 = 255.92/x
  3. Step 3: Cross multiply
    545x = 816.96 × 255.92
  4. Step 4: Simplify right side
    545x = 209,076.40
  5. Step 5: Solve for x
    x = 209,076.40/545
  6. Step 6: Final answer
    x = 383.63

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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.