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Finding the Fourth Proportional to 4,939.88, 7,409.10 and 1,476.68

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Solution

The fourth proportional to 4,939.88, 7,409.10 and 1,476.68 is: 2,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,939.88 : 7,409.10 = 1,476.68 : x
  2. Step 2: Convert to fraction form
    4,939.88/7,409.10 = 1,476.68/x
  3. Step 3: Cross multiply
    4,939.88x = 7,409.10 × 1,476.68
  4. Step 4: Simplify right side
    4,939.88x = 10,940,869.79
  5. Step 5: Solve for x
    x = 10,940,869.79/4,939.88
  6. Step 6: Final answer
    x = 2,214.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.