Home / 431,979.40-647,443.77-305,656.05

Finding the Fourth Proportional to 431,979.40, 647,443.77 and 305,656.05

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Solution

The fourth proportional to 431,979.40, 647,443.77 and 305,656.05 is: 458,112.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,979.40 : 647,443.77 = 305,656.05 : x
  2. Step 2: Convert to fraction form
    431,979.40/647,443.77 = 305,656.05/x
  3. Step 3: Cross multiply
    431,979.40x = 647,443.77 × 305,656.05
  4. Step 4: Simplify right side
    431,979.40x = 197,895,105,335.31
  5. Step 5: Solve for x
    x = 197,895,105,335.31/431,979.40
  6. Step 6: Final answer
    x = 458,112.37

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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.