Home / 1,581.43-2,372.15-485.79

Finding the Fourth Proportional to 1,581.43, 2,372.15 and 485.79

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Solution

The fourth proportional to 1,581.43, 2,372.15 and 485.79 is: 728.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.43 : 2,372.15 = 485.79 : x
  2. Step 2: Convert to fraction form
    1,581.43/2,372.15 = 485.79/x
  3. Step 3: Cross multiply
    1,581.43x = 2,372.15 × 485.79
  4. Step 4: Simplify right side
    1,581.43x = 1,152,356.33
  5. Step 5: Solve for x
    x = 1,152,356.33/1,581.43
  6. Step 6: Final answer
    x = 728.68

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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.