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Finding the Fourth Proportional to 704.39, 972.12 and 409.64

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Solution

The fourth proportional to 704.39, 972.12 and 409.64 is: 565.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.39 : 972.12 = 409.64 : x
  2. Step 2: Convert to fraction form
    704.39/972.12 = 409.64/x
  3. Step 3: Cross multiply
    704.39x = 972.12 × 409.64
  4. Step 4: Simplify right side
    704.39x = 398,220.80
  5. Step 5: Solve for x
    x = 398,220.80/704.39
  6. Step 6: Final answer
    x = 565.34

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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.