Home / 1,581.52-2,371.92-485.68

Finding the Fourth Proportional to 1,581.52, 2,371.92 and 485.68

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Solution

The fourth proportional to 1,581.52, 2,371.92 and 485.68 is: 728.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.52 : 2,371.92 = 485.68 : x
  2. Step 2: Convert to fraction form
    1,581.52/2,371.92 = 485.68/x
  3. Step 3: Cross multiply
    1,581.52x = 2,371.92 × 485.68
  4. Step 4: Simplify right side
    1,581.52x = 1,151,994.11
  5. Step 5: Solve for x
    x = 1,151,994.11/1,581.52
  6. Step 6: Final answer
    x = 728.41

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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.