Home / 391,481,721.62-540,279,199.80-215,300,763.26

Finding the Fourth Proportional to 391,481,721.62, 540,279,199.80 and 215,300,763.26

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Solution

The fourth proportional to 391,481,721.62, 540,279,199.80 and 215,300,763.26 is: 297,133,985.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481,721.62 : 540,279,199.80 = 215,300,763.26 : x
  2. Step 2: Convert to fraction form
    391,481,721.62/540,279,199.80 = 215,300,763.26/x
  3. Step 3: Cross multiply
    391,481,721.62x = 540,279,199.80 × 215,300,763.26
  4. Step 4: Simplify right side
    391,481,721.62x = 116,322,524,090,442,016
  5. Step 5: Solve for x
    x = 116,322,524,090,442,016/391,481,721.62
  6. Step 6: Final answer
    x = 297,133,985.23

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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.