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Finding the Fourth Proportional to 409.32, 564.61 and 269.45

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Solution

The fourth proportional to 409.32, 564.61 and 269.45 is: 371.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.32 : 564.61 = 269.45 : x
  2. Step 2: Convert to fraction form
    409.32/564.61 = 269.45/x
  3. Step 3: Cross multiply
    409.32x = 564.61 × 269.45
  4. Step 4: Simplify right side
    409.32x = 152,134.16
  5. Step 5: Solve for x
    x = 152,134.16/409.32
  6. Step 6: Final answer
    x = 371.68

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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.