Home / 1,186.23-1,779.39-320.55

Finding the Fourth Proportional to 1,186.23, 1,779.39 and 320.55

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Solution

The fourth proportional to 1,186.23, 1,779.39 and 320.55 is: 480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.23 : 1,779.39 = 320.55 : x
  2. Step 2: Convert to fraction form
    1,186.23/1,779.39 = 320.55/x
  3. Step 3: Cross multiply
    1,186.23x = 1,779.39 × 320.55
  4. Step 4: Simplify right side
    1,186.23x = 570,383.46
  5. Step 5: Solve for x
    x = 570,383.46/1,186.23
  6. Step 6: Final answer
    x = 480.84

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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.