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Finding the Fourth Proportional to 496,909.20, 685,719.72 and 276,145.74

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Solution

The fourth proportional to 496,909.20, 685,719.72 and 276,145.74 is: 381,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,909.20 : 685,719.72 = 276,145.74 : x
  2. Step 2: Convert to fraction form
    496,909.20/685,719.72 = 276,145.74/x
  3. Step 3: Cross multiply
    496,909.20x = 685,719.72 × 276,145.74
  4. Step 4: Simplify right side
    496,909.20x = 189,358,579,511.99
  5. Step 5: Solve for x
    x = 189,358,579,511.99/496,909.20
  6. Step 6: Final answer
    x = 381,072.80

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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.