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Finding the Fourth Proportional to 704.20, 971.84 and 409.49

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Solution

The fourth proportional to 704.20, 971.84 and 409.49 is: 565.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.20 : 971.84 = 409.49 : x
  2. Step 2: Convert to fraction form
    704.20/971.84 = 409.49/x
  3. Step 3: Cross multiply
    704.20x = 971.84 × 409.49
  4. Step 4: Simplify right side
    704.20x = 397,958.76
  5. Step 5: Solve for x
    x = 397,958.76/704.20
  6. Step 6: Final answer
    x = 565.12

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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.