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Finding the Fourth Proportional to 4,986.75, 7,480.16 and 2,381.79

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Solution

The fourth proportional to 4,986.75, 7,480.16 and 2,381.79 is: 3,572.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,986.75 : 7,480.16 = 2,381.79 : x
  2. Step 2: Convert to fraction form
    4,986.75/7,480.16 = 2,381.79/x
  3. Step 3: Cross multiply
    4,986.75x = 7,480.16 × 2,381.79
  4. Step 4: Simplify right side
    4,986.75x = 17,816,170.29
  5. Step 5: Solve for x
    x = 17,816,170.29/4,986.75
  6. Step 6: Final answer
    x = 3,572.70

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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.