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Finding the Fourth Proportional to 706.28, 974.59 and 411.55

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Solution

The fourth proportional to 706.28, 974.59 and 411.55 is: 567.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.28 : 974.59 = 411.55 : x
  2. Step 2: Convert to fraction form
    706.28/974.59 = 411.55/x
  3. Step 3: Cross multiply
    706.28x = 974.59 × 411.55
  4. Step 4: Simplify right side
    706.28x = 401,089.05
  5. Step 5: Solve for x
    x = 401,089.05/706.28
  6. Step 6: Final answer
    x = 567.89

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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.