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Finding the Fourth Proportional to 703,958.41, 971,481.74 and 398,080.54

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Solution

The fourth proportional to 703,958.41, 971,481.74 and 398,080.54 is: 549,361.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,958.41 : 971,481.74 = 398,080.54 : x
  2. Step 2: Convert to fraction form
    703,958.41/971,481.74 = 398,080.54/x
  3. Step 3: Cross multiply
    703,958.41x = 971,481.74 × 398,080.54
  4. Step 4: Simplify right side
    703,958.41x = 386,727,973,668.94
  5. Step 5: Solve for x
    x = 386,727,973,668.94/703,958.41
  6. Step 6: Final answer
    x = 549,361.96

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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.