Home / 391,481,918.60-540,279,471.06-215,300,963.72

Finding the Fourth Proportional to 391,481,918.60, 540,279,471.06 and 215,300,963.72

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Solution

The fourth proportional to 391,481,918.60, 540,279,471.06 and 215,300,963.72 is: 297,134,261.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481,918.60 : 540,279,471.06 = 215,300,963.72 : x
  2. Step 2: Convert to fraction form
    391,481,918.60/540,279,471.06 = 215,300,963.72/x
  3. Step 3: Cross multiply
    391,481,918.60x = 540,279,471.06 × 215,300,963.72
  4. Step 4: Simplify right side
    391,481,918.60x = 116,322,690,797,349,840
  5. Step 5: Solve for x
    x = 116,322,690,797,349,840/391,481,918.60
  6. Step 6: Final answer
    x = 297,134,261.56

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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.