Home / 717,680.45-990,399.35-395,387.73

Finding the Fourth Proportional to 717,680.45, 990,399.35 and 395,387.73

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Solution

The fourth proportional to 717,680.45, 990,399.35 and 395,387.73 is: 545,635.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,680.45 : 990,399.35 = 395,387.73 : x
  2. Step 2: Convert to fraction form
    717,680.45/990,399.35 = 395,387.73/x
  3. Step 3: Cross multiply
    717,680.45x = 990,399.35 × 395,387.73
  4. Step 4: Simplify right side
    717,680.45x = 391,591,751,778.45
  5. Step 5: Solve for x
    x = 391,591,751,778.45/717,680.45
  6. Step 6: Final answer
    x = 545,635.25

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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.