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Finding the Fourth Proportional to 5,491.72, 7,578.12 and 3,395.44

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Solution

The fourth proportional to 5,491.72, 7,578.12 and 3,395.44 is: 4,685.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,491.72 : 7,578.12 = 3,395.44 : x
  2. Step 2: Convert to fraction form
    5,491.72/7,578.12 = 3,395.44/x
  3. Step 3: Cross multiply
    5,491.72x = 7,578.12 × 3,395.44
  4. Step 4: Simplify right side
    5,491.72x = 25,731,051.77
  5. Step 5: Solve for x
    x = 25,731,051.77/5,491.72
  6. Step 6: Final answer
    x = 4,685.43

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1.5x scale

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.