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Finding the Fourth Proportional to 1,100.87, 1,651.32 and 320.93

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Solution

The fourth proportional to 1,100.87, 1,651.32 and 320.93 is: 481.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,100.87 : 1,651.32 = 320.93 : x
  2. Step 2: Convert to fraction form
    1,100.87/1,651.32 = 320.93/x
  3. Step 3: Cross multiply
    1,100.87x = 1,651.32 × 320.93
  4. Step 4: Simplify right side
    1,100.87x = 529,949.87
  5. Step 5: Solve for x
    x = 529,949.87/1,100.87
  6. Step 6: Final answer
    x = 481.39

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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.