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Finding the Fourth Proportional to 496,679.08, 685,340.90 and 278,899

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Solution

The fourth proportional to 496,679.08, 685,340.90 and 278,899 is: 384,837.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,679.08 : 685,340.90 = 278,899 : x
  2. Step 2: Convert to fraction form
    496,679.08/685,340.90 = 278,899/x
  3. Step 3: Cross multiply
    496,679.08x = 685,340.90 × 278,899
  4. Step 4: Simplify right side
    496,679.08x = 191,140,891,669.10
  5. Step 5: Solve for x
    x = 191,140,891,669.10/496,679.08
  6. Step 6: Final answer
    x = 384,837.81

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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.