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Finding the Fourth Proportional to 704.16, 971.74 and 393.66

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Solution

The fourth proportional to 704.16, 971.74 and 393.66 is: 543.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.16 : 971.74 = 393.66 : x
  2. Step 2: Convert to fraction form
    704.16/971.74 = 393.66/x
  3. Step 3: Cross multiply
    704.16x = 971.74 × 393.66
  4. Step 4: Simplify right side
    704.16x = 382,530.54
  5. Step 5: Solve for x
    x = 382,530.54/704.16
  6. Step 6: Final answer
    x = 543.25

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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.