Home / 1,160.38-1,739.80-640.63

Finding the Fourth Proportional to 1,160.38, 1,739.80 and 640.63

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Solution

The fourth proportional to 1,160.38, 1,739.80 and 640.63 is: 960.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,160.38 : 1,739.80 = 640.63 : x
  2. Step 2: Convert to fraction form
    1,160.38/1,739.80 = 640.63/x
  3. Step 3: Cross multiply
    1,160.38x = 1,739.80 × 640.63
  4. Step 4: Simplify right side
    1,160.38x = 1,114,571.05
  5. Step 5: Solve for x
    x = 1,114,571.05/1,160.38
  6. Step 6: Final answer
    x = 960.52

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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.