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Finding the Fourth Proportional to 491,446.34, 678,217.77 and 276,600.32

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Solution

The fourth proportional to 491,446.34, 678,217.77 and 276,600.32 is: 381,720.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,446.34 : 678,217.77 = 276,600.32 : x
  2. Step 2: Convert to fraction form
    491,446.34/678,217.77 = 276,600.32/x
  3. Step 3: Cross multiply
    491,446.34x = 678,217.77 × 276,600.32
  4. Step 4: Simplify right side
    491,446.34x = 187,595,248,820.60
  5. Step 5: Solve for x
    x = 187,595,248,820.60/491,446.34
  6. Step 6: Final answer
    x = 381,720.72

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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.