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Finding the Fourth Proportional to 706.96, 1,059.52 and 398.68

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Solution

The fourth proportional to 706.96, 1,059.52 and 398.68 is: 597.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.96 : 1,059.52 = 398.68 : x
  2. Step 2: Convert to fraction form
    706.96/1,059.52 = 398.68/x
  3. Step 3: Cross multiply
    706.96x = 1,059.52 × 398.68
  4. Step 4: Simplify right side
    706.96x = 422,409.43
  5. Step 5: Solve for x
    x = 422,409.43/706.96
  6. Step 6: Final answer
    x = 597.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.