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Finding the Fourth Proportional to 412.46, 569.63 and 280.27

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Solution

The fourth proportional to 412.46, 569.63 and 280.27 is: 387.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.46 : 569.63 = 280.27 : x
  2. Step 2: Convert to fraction form
    412.46/569.63 = 280.27/x
  3. Step 3: Cross multiply
    412.46x = 569.63 × 280.27
  4. Step 4: Simplify right side
    412.46x = 159,650.90
  5. Step 5: Solve for x
    x = 159,650.90/412.46
  6. Step 6: Final answer
    x = 387.07

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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.