Home / 1,581.44-2,372.09-485.82

Finding the Fourth Proportional to 1,581.44, 2,372.09 and 485.82

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Solution

The fourth proportional to 1,581.44, 2,372.09 and 485.82 is: 728.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.44 : 2,372.09 = 485.82 : x
  2. Step 2: Convert to fraction form
    1,581.44/2,372.09 = 485.82/x
  3. Step 3: Cross multiply
    1,581.44x = 2,372.09 × 485.82
  4. Step 4: Simplify right side
    1,581.44x = 1,152,394.47
  5. Step 5: Solve for x
    x = 1,152,394.47/1,581.44
  6. Step 6: Final answer
    x = 728.70

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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.