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Finding the Fourth Proportional to 309,107.54, 426,568.32 and 188,248.79

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Solution

The fourth proportional to 309,107.54, 426,568.32 and 188,248.79 is: 259,783.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,107.54 : 426,568.32 = 188,248.79 : x
  2. Step 2: Convert to fraction form
    309,107.54/426,568.32 = 188,248.79/x
  3. Step 3: Cross multiply
    309,107.54x = 426,568.32 × 188,248.79
  4. Step 4: Simplify right side
    309,107.54x = 80,300,967,959.49
  5. Step 5: Solve for x
    x = 80,300,967,959.49/309,107.54
  6. Step 6: Final answer
    x = 259,783.28

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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.