Home / 1,190.10-1,785.21-324.39

Finding the Fourth Proportional to 1,190.10, 1,785.21 and 324.39

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Solution

The fourth proportional to 1,190.10, 1,785.21 and 324.39 is: 486.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,190.10 : 1,785.21 = 324.39 : x
  2. Step 2: Convert to fraction form
    1,190.10/1,785.21 = 324.39/x
  3. Step 3: Cross multiply
    1,190.10x = 1,785.21 × 324.39
  4. Step 4: Simplify right side
    1,190.10x = 579,104.27
  5. Step 5: Solve for x
    x = 579,104.27/1,190.10
  6. Step 6: Final answer
    x = 486.60

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1.5x scale

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.