Home / 5,215.46-7,822.56-1,319.90

Finding the Fourth Proportional to 5,215.46, 7,822.56 and 1,319.90

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Solution

The fourth proportional to 5,215.46, 7,822.56 and 1,319.90 is: 1,979.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.46 : 7,822.56 = 1,319.90 : x
  2. Step 2: Convert to fraction form
    5,215.46/7,822.56 = 1,319.90/x
  3. Step 3: Cross multiply
    5,215.46x = 7,822.56 × 1,319.90
  4. Step 4: Simplify right side
    5,215.46x = 10,324,996.94
  5. Step 5: Solve for x
    x = 10,324,996.94/5,215.46
  6. Step 6: Final answer
    x = 1,979.69

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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.