Home / 491,910.12-678,837.24-287,924.04

Finding the Fourth Proportional to 491,910.12, 678,837.24 and 287,924.04

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Solution

The fourth proportional to 491,910.12, 678,837.24 and 287,924.04 is: 397,335.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,910.12 : 678,837.24 = 287,924.04 : x
  2. Step 2: Convert to fraction form
    491,910.12/678,837.24 = 287,924.04/x
  3. Step 3: Cross multiply
    491,910.12x = 678,837.24 × 287,924.04
  4. Step 4: Simplify right side
    491,910.12x = 195,453,560,643.25
  5. Step 5: Solve for x
    x = 195,453,560,643.25/491,910.12
  6. Step 6: Final answer
    x = 397,335.92

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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.