Home / 1,581.28-2,371.71-485.55

Finding the Fourth Proportional to 1,581.28, 2,371.71 and 485.55

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Solution

The fourth proportional to 1,581.28, 2,371.71 and 485.55 is: 728.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.28 : 2,371.71 = 485.55 : x
  2. Step 2: Convert to fraction form
    1,581.28/2,371.71 = 485.55/x
  3. Step 3: Cross multiply
    1,581.28x = 2,371.71 × 485.55
  4. Step 4: Simplify right side
    1,581.28x = 1,151,582.88
  5. Step 5: Solve for x
    x = 1,151,582.88/1,581.28
  6. Step 6: Final answer
    x = 728.26

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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.