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Finding the Fourth Proportional to 5,371.40, 8,052.78 and 4,939.40

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Solution

The fourth proportional to 5,371.40, 8,052.78 and 4,939.40 is: 7,405.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,371.40 : 8,052.78 = 4,939.40 : x
  2. Step 2: Convert to fraction form
    5,371.40/8,052.78 = 4,939.40/x
  3. Step 3: Cross multiply
    5,371.40x = 8,052.78 × 4,939.40
  4. Step 4: Simplify right side
    5,371.40x = 39,775,901.53
  5. Step 5: Solve for x
    x = 39,775,901.53/5,371.40
  6. Step 6: Final answer
    x = 7,405.13

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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.