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Finding the Fourth Proportional to 491,310.12, 678,006.72 and 276,450.42

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Solution

The fourth proportional to 491,310.12, 678,006.72 and 276,450.42 is: 381,500.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,310.12 : 678,006.72 = 276,450.42 : x
  2. Step 2: Convert to fraction form
    491,310.12/678,006.72 = 276,450.42/x
  3. Step 3: Cross multiply
    491,310.12x = 678,006.72 × 276,450.42
  4. Step 4: Simplify right side
    491,310.12x = 187,435,242,506.82
  5. Step 5: Solve for x
    x = 187,435,242,506.82/491,310.12
  6. Step 6: Final answer
    x = 381,500.88

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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.