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Finding the Fourth Proportional to 491,610.87, 678,487.68 and 276,792.80

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Solution

The fourth proportional to 491,610.87, 678,487.68 and 276,792.80 is: 382,010.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,610.87 : 678,487.68 = 276,792.80 : x
  2. Step 2: Convert to fraction form
    491,610.87/678,487.68 = 276,792.80/x
  3. Step 3: Cross multiply
    491,610.87x = 678,487.68 × 276,792.80
  4. Step 4: Simplify right side
    491,610.87x = 187,800,501,320.27
  5. Step 5: Solve for x
    x = 187,800,501,320.27/491,610.87
  6. Step 6: Final answer
    x = 382,010.47

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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.