Home / 717,387.20-990,039.09-395,097.22

Finding the Fourth Proportional to 717,387.20, 990,039.09 and 395,097.22

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Solution

The fourth proportional to 717,387.20, 990,039.09 and 395,097.22 is: 545,258.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,387.20 : 990,039.09 = 395,097.22 : x
  2. Step 2: Convert to fraction form
    717,387.20/990,039.09 = 395,097.22/x
  3. Step 3: Cross multiply
    717,387.20x = 990,039.09 × 395,097.22
  4. Step 4: Simplify right side
    717,387.20x = 391,161,692,150.33
  5. Step 5: Solve for x
    x = 391,161,692,150.33/717,387.20
  6. Step 6: Final answer
    x = 545,258.81

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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.