Home / 639,055.98-958,078.80-319,043.61

Finding the Fourth Proportional to 639,055.98, 958,078.80 and 319,043.61

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Solution

The fourth proportional to 639,055.98, 958,078.80 and 319,043.61 is: 478,313.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,055.98 : 958,078.80 = 319,043.61 : x
  2. Step 2: Convert to fraction form
    639,055.98/958,078.80 = 319,043.61/x
  3. Step 3: Cross multiply
    639,055.98x = 958,078.80 × 319,043.61
  4. Step 4: Simplify right side
    639,055.98x = 305,668,919,016.47
  5. Step 5: Solve for x
    x = 305,668,919,016.47/639,055.98
  6. Step 6: Final answer
    x = 478,313.21

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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.