Home / 391,716,635.45-540,568,148.65-215,504,208.59

Finding the Fourth Proportional to 391,716,635.45, 540,568,148.65 and 215,504,208.59

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Solution

The fourth proportional to 391,716,635.45, 540,568,148.65 and 215,504,208.59 is: 297,395,363.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,716,635.45 : 540,568,148.65 = 215,504,208.59 : x
  2. Step 2: Convert to fraction form
    391,716,635.45/540,568,148.65 = 215,504,208.59/x
  3. Step 3: Cross multiply
    391,716,635.45x = 540,568,148.65 × 215,504,208.59
  4. Step 4: Simplify right side
    391,716,635.45x = 116,494,711,060,538,144
  5. Step 5: Solve for x
    x = 116,494,711,060,538,144/391,716,635.45
  6. Step 6: Final answer
    x = 297,395,363.18

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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.