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Finding the Fourth Proportional to 548.93, 821.93 and 433.60

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Solution

The fourth proportional to 548.93, 821.93 and 433.60 is: 649.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.93 : 821.93 = 433.60 : x
  2. Step 2: Convert to fraction form
    548.93/821.93 = 433.60/x
  3. Step 3: Cross multiply
    548.93x = 821.93 × 433.60
  4. Step 4: Simplify right side
    548.93x = 356,388.85
  5. Step 5: Solve for x
    x = 356,388.85/548.93
  6. Step 6: Final answer
    x = 649.24

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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.