Home / 491,835.11-678,761.38-300,885.10

Finding the Fourth Proportional to 491,835.11, 678,761.38 and 300,885.10

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Solution

The fourth proportional to 491,835.11, 678,761.38 and 300,885.10 is: 415,239.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,835.11 : 678,761.38 = 300,885.10 : x
  2. Step 2: Convert to fraction form
    491,835.11/678,761.38 = 300,885.10/x
  3. Step 3: Cross multiply
    491,835.11x = 678,761.38 × 300,885.10
  4. Step 4: Simplify right side
    491,835.11x = 204,229,185,697.44
  5. Step 5: Solve for x
    x = 204,229,185,697.44/491,835.11
  6. Step 6: Final answer
    x = 415,239.14

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1.5x scale

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.