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Finding the Fourth Proportional to 491,799.60, 678,676.80 and 276,960.72

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Solution

The fourth proportional to 491,799.60, 678,676.80 and 276,960.72 is: 382,202.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,799.60 : 678,676.80 = 276,960.72 : x
  2. Step 2: Convert to fraction form
    491,799.60/678,676.80 = 276,960.72/x
  3. Step 3: Cross multiply
    491,799.60x = 678,676.80 × 276,960.72
  4. Step 4: Simplify right side
    491,799.60x = 187,966,815,175.30
  5. Step 5: Solve for x
    x = 187,966,815,175.30/491,799.60
  6. Step 6: Final answer
    x = 382,202.05

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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.