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Finding the Fourth Proportional to 1,600.80, 2,400.75 and 779.10

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Solution

The fourth proportional to 1,600.80, 2,400.75 and 779.10 is: 1,168.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,600.80 : 2,400.75 = 779.10 : x
  2. Step 2: Convert to fraction form
    1,600.80/2,400.75 = 779.10/x
  3. Step 3: Cross multiply
    1,600.80x = 2,400.75 × 779.10
  4. Step 4: Simplify right side
    1,600.80x = 1,870,424.33
  5. Step 5: Solve for x
    x = 1,870,424.33/1,600.80
  6. Step 6: Final answer
    x = 1,168.43

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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.