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Finding the Fourth Proportional to 704.22, 972.15 and 409.38

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Solution

The fourth proportional to 704.22, 972.15 and 409.38 is: 565.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.22 : 972.15 = 409.38 : x
  2. Step 2: Convert to fraction form
    704.22/972.15 = 409.38/x
  3. Step 3: Cross multiply
    704.22x = 972.15 × 409.38
  4. Step 4: Simplify right side
    704.22x = 397,978.77
  5. Step 5: Solve for x
    x = 397,978.77/704.22
  6. Step 6: Final answer
    x = 565.13

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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.