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Finding the Fourth Proportional to 486.07, 728.93 and 280.73

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Solution

The fourth proportional to 486.07, 728.93 and 280.73 is: 421.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.07 : 728.93 = 280.73 : x
  2. Step 2: Convert to fraction form
    486.07/728.93 = 280.73/x
  3. Step 3: Cross multiply
    486.07x = 728.93 × 280.73
  4. Step 4: Simplify right side
    486.07x = 204,635.04
  5. Step 5: Solve for x
    x = 204,635.04/486.07
  6. Step 6: Final answer
    x = 421.00

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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.