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Finding the Fourth Proportional to 703,432.62, 970,609.20 and 393,340.80

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Solution

The fourth proportional to 703,432.62, 970,609.20 and 393,340.80 is: 542,738.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    703,432.62 : 970,609.20 = 393,340.80 : x
  2. Step 2: Convert to fraction form
    703,432.62/970,609.20 = 393,340.80/x
  3. Step 3: Cross multiply
    703,432.62x = 970,609.20 × 393,340.80
  4. Step 4: Simplify right side
    703,432.62x = 381,780,199,215.36
  5. Step 5: Solve for x
    x = 381,780,199,215.36/703,432.62
  6. Step 6: Final answer
    x = 542,738.83

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Double scale
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1.5x scale

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.