Home / 1,489.30-2,231.52-1,055.68

Finding the Fourth Proportional to 1,489.30, 2,231.52 and 1,055.68

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Solution

The fourth proportional to 1,489.30, 2,231.52 and 1,055.68 is: 1,581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.30 : 2,231.52 = 1,055.68 : x
  2. Step 2: Convert to fraction form
    1,489.30/2,231.52 = 1,055.68/x
  3. Step 3: Cross multiply
    1,489.30x = 2,231.52 × 1,055.68
  4. Step 4: Simplify right side
    1,489.30x = 2,355,771.03
  5. Step 5: Solve for x
    x = 2,355,771.03/1,489.30
  6. Step 6: Final answer
    x = 1,581.80

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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.