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Finding the Fourth Proportional to 491,800.60, 678,678.18 and 276,961.72

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Solution

The fourth proportional to 491,800.60, 678,678.18 and 276,961.72 is: 382,203.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,800.60 : 678,678.18 = 276,961.72 : x
  2. Step 2: Convert to fraction form
    491,800.60/678,678.18 = 276,961.72/x
  3. Step 3: Cross multiply
    491,800.60x = 678,678.18 × 276,961.72
  4. Step 4: Simplify right side
    491,800.60x = 187,967,876,059.27
  5. Step 5: Solve for x
    x = 187,967,876,059.27/491,800.60
  6. Step 6: Final answer
    x = 382,203.43

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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.