Home / 1,189.20-1,641.56-1,064.64

Finding the Fourth Proportional to 1,189.20, 1,641.56 and 1,064.64

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Solution

The fourth proportional to 1,189.20, 1,641.56 and 1,064.64 is: 1,469.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.20 : 1,641.56 = 1,064.64 : x
  2. Step 2: Convert to fraction form
    1,189.20/1,641.56 = 1,064.64/x
  3. Step 3: Cross multiply
    1,189.20x = 1,641.56 × 1,064.64
  4. Step 4: Simplify right side
    1,189.20x = 1,747,670.44
  5. Step 5: Solve for x
    x = 1,747,670.44/1,189.20
  6. Step 6: Final answer
    x = 1,469.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.