Home / 391,481,889.60-540,279,431.04-215,300,934.72

Finding the Fourth Proportional to 391,481,889.60, 540,279,431.04 and 215,300,934.72

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Solution

The fourth proportional to 391,481,889.60, 540,279,431.04 and 215,300,934.72 is: 297,134,221.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481,889.60 : 540,279,431.04 = 215,300,934.72 : x
  2. Step 2: Convert to fraction form
    391,481,889.60/540,279,431.04 = 215,300,934.72/x
  3. Step 3: Cross multiply
    391,481,889.60x = 540,279,431.04 × 215,300,934.72
  4. Step 4: Simplify right side
    391,481,889.60x = 116,322,666,512,901,776
  5. Step 5: Solve for x
    x = 116,322,666,512,901,776/391,481,889.60
  6. Step 6: Final answer
    x = 297,134,221.54

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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.