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Finding the Fourth Proportional to 3,728, 5,586.80 and 2,802.47

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Solution

The fourth proportional to 3,728, 5,586.80 and 2,802.47 is: 4,199.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,728 : 5,586.80 = 2,802.47 : x
  2. Step 2: Convert to fraction form
    3,728/5,586.80 = 2,802.47/x
  3. Step 3: Cross multiply
    3,728x = 5,586.80 × 2,802.47
  4. Step 4: Simplify right side
    3,728x = 15,656,839.40
  5. Step 5: Solve for x
    x = 15,656,839.40/3,728
  6. Step 6: Final answer
    x = 4,199.80

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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.