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Finding the Fourth Proportional to 603,613,627.80, 905,420,441.70 and 215,449,121.40

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Solution

The fourth proportional to 603,613,627.80, 905,420,441.70 and 215,449,121.40 is: 323,173,682.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,613,627.80 : 905,420,441.70 = 215,449,121.40 : x
  2. Step 2: Convert to fraction form
    603,613,627.80/905,420,441.70 = 215,449,121.40/x
  3. Step 3: Cross multiply
    603,613,627.80x = 905,420,441.70 × 215,449,121.40
  4. Step 4: Simplify right side
    603,613,627.80x = 195,072,038,661,864,928
  5. Step 5: Solve for x
    x = 195,072,038,661,864,928/603,613,627.80
  6. Step 6: Final answer
    x = 323,173,682.10

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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.