Home / 491,876,642.21-678,789,191.07-268,859,788.52

Finding the Fourth Proportional to 491,876,642.21, 678,789,191.07 and 268,859,788.52

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Solution

The fourth proportional to 491,876,642.21, 678,789,191.07 and 268,859,788.52 is: 371,026,193.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,876,642.21 : 678,789,191.07 = 268,859,788.52 : x
  2. Step 2: Convert to fraction form
    491,876,642.21/678,789,191.07 = 268,859,788.52/x
  3. Step 3: Cross multiply
    491,876,642.21x = 678,789,191.07 × 268,859,788.52
  4. Step 4: Simplify right side
    491,876,642.21x = 182,499,118,357,348,128
  5. Step 5: Solve for x
    x = 182,499,118,357,348,128/491,876,642.21
  6. Step 6: Final answer
    x = 371,026,193.76

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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.