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Finding the Fourth Proportional to 704.63, 972.45 and 405.96

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Solution

The fourth proportional to 704.63, 972.45 and 405.96 is: 560.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.63 : 972.45 = 405.96 : x
  2. Step 2: Convert to fraction form
    704.63/972.45 = 405.96/x
  3. Step 3: Cross multiply
    704.63x = 972.45 × 405.96
  4. Step 4: Simplify right side
    704.63x = 394,775.80
  5. Step 5: Solve for x
    x = 394,775.80/704.63
  6. Step 6: Final answer
    x = 560.26

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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.