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Finding the Fourth Proportional to 704.31, 971.93 and 405.47

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Solution

The fourth proportional to 704.31, 971.93 and 405.47 is: 559.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.31 : 971.93 = 405.47 : x
  2. Step 2: Convert to fraction form
    704.31/971.93 = 405.47/x
  3. Step 3: Cross multiply
    704.31x = 971.93 × 405.47
  4. Step 4: Simplify right side
    704.31x = 394,091.90
  5. Step 5: Solve for x
    x = 394,091.90/704.31
  6. Step 6: Final answer
    x = 559.54

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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.