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Finding the Fourth Proportional to 309,505.36, 424,335.81 and 303,906.64

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Solution

The fourth proportional to 309,505.36, 424,335.81 and 303,906.64 is: 416,659.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,505.36 : 424,335.81 = 303,906.64 : x
  2. Step 2: Convert to fraction form
    309,505.36/424,335.81 = 303,906.64/x
  3. Step 3: Cross multiply
    309,505.36x = 424,335.81 × 303,906.64
  4. Step 4: Simplify right side
    309,505.36x = 128,958,470,248.78
  5. Step 5: Solve for x
    x = 128,958,470,248.78/309,505.36
  6. Step 6: Final answer
    x = 416,659.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.