Home / 1,190.40-1,785.54-324.72

Finding the Fourth Proportional to 1,190.40, 1,785.54 and 324.72

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Solution

The fourth proportional to 1,190.40, 1,785.54 and 324.72 is: 487.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.40 : 1,785.54 = 324.72 : x
  2. Step 2: Convert to fraction form
    1,190.40/1,785.54 = 324.72/x
  3. Step 3: Cross multiply
    1,190.40x = 1,785.54 × 324.72
  4. Step 4: Simplify right side
    1,190.40x = 579,800.55
  5. Step 5: Solve for x
    x = 579,800.55/1,190.40
  6. Step 6: Final answer
    x = 487.06

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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.