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Finding the Fourth Proportional to 3,887.60, 5,830.80 and 1,578.56

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Solution

The fourth proportional to 3,887.60, 5,830.80 and 1,578.56 is: 2,367.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.60 : 5,830.80 = 1,578.56 : x
  2. Step 2: Convert to fraction form
    3,887.60/5,830.80 = 1,578.56/x
  3. Step 3: Cross multiply
    3,887.60x = 5,830.80 × 1,578.56
  4. Step 4: Simplify right side
    3,887.60x = 9,204,267.65
  5. Step 5: Solve for x
    x = 9,204,267.65/3,887.60
  6. Step 6: Final answer
    x = 2,367.60

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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.