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Finding the Fourth Proportional to 491,842.45, 678,745.07 and 276,986.17

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Solution

The fourth proportional to 491,842.45, 678,745.07 and 276,986.17 is: 382,242.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,842.45 : 678,745.07 = 276,986.17 : x
  2. Step 2: Convert to fraction form
    491,842.45/678,745.07 = 276,986.17/x
  3. Step 3: Cross multiply
    491,842.45x = 678,745.07 × 276,986.17
  4. Step 4: Simplify right side
    491,842.45x = 188,002,997,345.68
  5. Step 5: Solve for x
    x = 188,002,997,345.68/491,842.45
  6. Step 6: Final answer
    x = 382,242.32

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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.