Home / 1,581.08-2,371.62-485.42

Finding the Fourth Proportional to 1,581.08, 2,371.62 and 485.42

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Solution

The fourth proportional to 1,581.08, 2,371.62 and 485.42 is: 728.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.08 : 2,371.62 = 485.42 : x
  2. Step 2: Convert to fraction form
    1,581.08/2,371.62 = 485.42/x
  3. Step 3: Cross multiply
    1,581.08x = 2,371.62 × 485.42
  4. Step 4: Simplify right side
    1,581.08x = 1,151,231.78
  5. Step 5: Solve for x
    x = 1,151,231.78/1,581.08
  6. Step 6: Final answer
    x = 728.13

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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.