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Finding the Fourth Proportional to 548.65, 821.36 and 288.03

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Solution

The fourth proportional to 548.65, 821.36 and 288.03 is: 431.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    548.65 : 821.36 = 288.03 : x
  2. Step 2: Convert to fraction form
    548.65/821.36 = 288.03/x
  3. Step 3: Cross multiply
    548.65x = 821.36 × 288.03
  4. Step 4: Simplify right side
    548.65x = 236,577.04
  5. Step 5: Solve for x
    x = 236,577.04/548.65
  6. Step 6: Final answer
    x = 431.20

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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.