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Finding the Fourth Proportional to 5,328.70, 7,989.72 and 1,629.70

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Solution

The fourth proportional to 5,328.70, 7,989.72 and 1,629.70 is: 2,443.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,328.70 : 7,989.72 = 1,629.70 : x
  2. Step 2: Convert to fraction form
    5,328.70/7,989.72 = 1,629.70/x
  3. Step 3: Cross multiply
    5,328.70x = 7,989.72 × 1,629.70
  4. Step 4: Simplify right side
    5,328.70x = 13,020,846.68
  5. Step 5: Solve for x
    x = 13,020,846.68/5,328.70
  6. Step 6: Final answer
    x = 2,443.53

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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.