Home / 1,319.43-1,979.45-441.86

Finding the Fourth Proportional to 1,319.43, 1,979.45 and 441.86

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Solution

The fourth proportional to 1,319.43, 1,979.45 and 441.86 is: 662.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.43 : 1,979.45 = 441.86 : x
  2. Step 2: Convert to fraction form
    1,319.43/1,979.45 = 441.86/x
  3. Step 3: Cross multiply
    1,319.43x = 1,979.45 × 441.86
  4. Step 4: Simplify right side
    1,319.43x = 874,627.67
  5. Step 5: Solve for x
    x = 874,627.67/1,319.43
  6. Step 6: Final answer
    x = 662.88

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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.