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Finding the Fourth Proportional to 486,920.20, 731,609.10 and 309,512.20

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Solution

The fourth proportional to 486,920.20, 731,609.10 and 309,512.20 is: 465,049.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,920.20 : 731,609.10 = 309,512.20 : x
  2. Step 2: Convert to fraction form
    486,920.20/731,609.10 = 309,512.20/x
  3. Step 3: Cross multiply
    486,920.20x = 731,609.10 × 309,512.20
  4. Step 4: Simplify right side
    486,920.20x = 226,441,942,081.02
  5. Step 5: Solve for x
    x = 226,441,942,081.02/486,920.20
  6. Step 6: Final answer
    x = 465,049.39

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1.5x scale

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.