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Finding the Fourth Proportional to 409.15, 564.57 and 298.28

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Solution

The fourth proportional to 409.15, 564.57 and 298.28 is: 411.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.15 : 564.57 = 298.28 : x
  2. Step 2: Convert to fraction form
    409.15/564.57 = 298.28/x
  3. Step 3: Cross multiply
    409.15x = 564.57 × 298.28
  4. Step 4: Simplify right side
    409.15x = 168,399.94
  5. Step 5: Solve for x
    x = 168,399.94/409.15
  6. Step 6: Final answer
    x = 411.58

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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.