Home / 717,723.87-990,458.40-395,433.97

Finding the Fourth Proportional to 717,723.87, 990,458.40 and 395,433.97

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Solution

The fourth proportional to 717,723.87, 990,458.40 and 395,433.97 is: 545,698.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,723.87 : 990,458.40 = 395,433.97 : x
  2. Step 2: Convert to fraction form
    717,723.87/990,458.40 = 395,433.97/x
  3. Step 3: Cross multiply
    717,723.87x = 990,458.40 × 395,433.97
  4. Step 4: Simplify right side
    717,723.87x = 391,660,894,755.70
  5. Step 5: Solve for x
    x = 391,660,894,755.70/717,723.87
  6. Step 6: Final answer
    x = 545,698.58

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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.