Home / 391,501,668.11-540,286,320.22-215,303,290.29

Finding the Fourth Proportional to 391,501,668.11, 540,286,320.22 and 215,303,290.29

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Solution

The fourth proportional to 391,501,668.11, 540,286,320.22 and 215,303,290.29 is: 297,126,249.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501,668.11 : 540,286,320.22 = 215,303,290.29 : x
  2. Step 2: Convert to fraction form
    391,501,668.11/540,286,320.22 = 215,303,290.29/x
  3. Step 3: Cross multiply
    391,501,668.11x = 540,286,320.22 × 215,303,290.29
  4. Step 4: Simplify right side
    391,501,668.11x = 116,325,422,441,504,288
  5. Step 5: Solve for x
    x = 116,325,422,441,504,288/391,501,668.11
  6. Step 6: Final answer
    x = 297,126,249.82

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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.