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Finding the Fourth Proportional to 704.64, 972.56 and 409.96

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Solution

The fourth proportional to 704.64, 972.56 and 409.96 is: 565.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.64 : 972.56 = 409.96 : x
  2. Step 2: Convert to fraction form
    704.64/972.56 = 409.96/x
  3. Step 3: Cross multiply
    704.64x = 972.56 × 409.96
  4. Step 4: Simplify right side
    704.64x = 398,710.70
  5. Step 5: Solve for x
    x = 398,710.70/704.64
  6. Step 6: Final answer
    x = 565.84

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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.