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Finding the Fourth Proportional to 704.32, 971.94 and 393.82

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Solution

The fourth proportional to 704.32, 971.94 and 393.82 is: 543.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.32 : 971.94 = 393.82 : x
  2. Step 2: Convert to fraction form
    704.32/971.94 = 393.82/x
  3. Step 3: Cross multiply
    704.32x = 971.94 × 393.82
  4. Step 4: Simplify right side
    704.32x = 382,769.41
  5. Step 5: Solve for x
    x = 382,769.41/704.32
  6. Step 6: Final answer
    x = 543.46

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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.