Home / 391,953,318.44-540,874,996.77-215,707,627.61

Finding the Fourth Proportional to 391,953,318.44, 540,874,996.77 and 215,707,627.61

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Solution

The fourth proportional to 391,953,318.44, 540,874,996.77 and 215,707,627.61 is: 297,665,198.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,953,318.44 : 540,874,996.77 = 215,707,627.61 : x
  2. Step 2: Convert to fraction form
    391,953,318.44/540,874,996.77 = 215,707,627.61/x
  3. Step 3: Cross multiply
    391,953,318.44x = 540,874,996.77 × 215,707,627.61
  4. Step 4: Simplify right side
    391,953,318.44x = 116,670,862,389,391,648
  5. Step 5: Solve for x
    x = 116,670,862,389,391,648/391,953,318.44
  6. Step 6: Final answer
    x = 297,665,198.64

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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.