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Finding the Fourth Proportional to 411.01, 566.90 and 280.33

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Solution

The fourth proportional to 411.01, 566.90 and 280.33 is: 386.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.01 : 566.90 = 280.33 : x
  2. Step 2: Convert to fraction form
    411.01/566.90 = 280.33/x
  3. Step 3: Cross multiply
    411.01x = 566.90 × 280.33
  4. Step 4: Simplify right side
    411.01x = 158,917.31
  5. Step 5: Solve for x
    x = 158,917.31/411.01
  6. Step 6: Final answer
    x = 386.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.