Home / 491,876,643.21-678,789,192.45-268,859,789.52

Finding the Fourth Proportional to 491,876,643.21, 678,789,192.45 and 268,859,789.52

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Solution

The fourth proportional to 491,876,643.21, 678,789,192.45 and 268,859,789.52 is: 371,026,195.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,876,643.21 : 678,789,192.45 = 268,859,789.52 : x
  2. Step 2: Convert to fraction form
    491,876,643.21/678,789,192.45 = 268,859,789.52/x
  3. Step 3: Cross multiply
    491,876,643.21x = 678,789,192.45 × 268,859,789.52
  4. Step 4: Simplify right side
    491,876,643.21x = 182,499,119,410,557,760
  5. Step 5: Solve for x
    x = 182,499,119,410,557,760/491,876,643.21
  6. Step 6: Final answer
    x = 371,026,195.14

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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.