Home / 1,581.89-2,372.45-485.96

Finding the Fourth Proportional to 1,581.89, 2,372.45 and 485.96

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Solution

The fourth proportional to 1,581.89, 2,372.45 and 485.96 is: 728.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.89 : 2,372.45 = 485.96 : x
  2. Step 2: Convert to fraction form
    1,581.89/2,372.45 = 485.96/x
  3. Step 3: Cross multiply
    1,581.89x = 2,372.45 × 485.96
  4. Step 4: Simplify right side
    1,581.89x = 1,152,901.51
  5. Step 5: Solve for x
    x = 1,152,901.51/1,581.89
  6. Step 6: Final answer
    x = 728.81

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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.