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Finding the Fourth Proportional to 491,640.96, 678,425.76 and 276,738.24

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Solution

The fourth proportional to 491,640.96, 678,425.76 and 276,738.24 is: 381,876.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,640.96 : 678,425.76 = 276,738.24 : x
  2. Step 2: Convert to fraction form
    491,640.96/678,425.76 = 276,738.24/x
  3. Step 3: Cross multiply
    491,640.96x = 678,425.76 × 276,738.24
  4. Step 4: Simplify right side
    491,640.96x = 187,746,350,793.06
  5. Step 5: Solve for x
    x = 187,746,350,793.06/491,640.96
  6. Step 6: Final answer
    x = 381,876.95

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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.