Home / 385,456,978,617.72-531,943,387,301.88-211,848,271,715.78

Finding the Fourth Proportional to 385,456,978,617.72, 531,943,387,301.88 and 211,848,271,715.78

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Solution

The fourth proportional to 385,456,978,617.72, 531,943,387,301.88 and 211,848,271,715.78 is: 292,357,626,147.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,456,978,617.72 : 531,943,387,301.88 = 211,848,271,715.78 : x
  2. Step 2: Convert to fraction form
    385,456,978,617.72/531,943,387,301.88 = 211,848,271,715.78/x
  3. Step 3: Cross multiply
    385,456,978,617.72x = 531,943,387,301.88 × 211,848,271,715.78
  4. Step 4: Simplify right side
    385,456,978,617.72x = 112,691,287,250,541,071,040,512
  5. Step 5: Solve for x
    x = 112,691,287,250,541,071,040,512/385,456,978,617.72
  6. Step 6: Final answer
    x = 292,357,626,147.18

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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.