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Finding the Fourth Proportional to 409.96, 565.44 and 340.28

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Solution

The fourth proportional to 409.96, 565.44 and 340.28 is: 469.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.96 : 565.44 = 340.28 : x
  2. Step 2: Convert to fraction form
    409.96/565.44 = 340.28/x
  3. Step 3: Cross multiply
    409.96x = 565.44 × 340.28
  4. Step 4: Simplify right side
    409.96x = 192,407.92
  5. Step 5: Solve for x
    x = 192,407.92/409.96
  6. Step 6: Final answer
    x = 469.33

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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.