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Finding the Fourth Proportional to 1,186.35, 1,779.53 and 320.66

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Solution

The fourth proportional to 1,186.35, 1,779.53 and 320.66 is: 480.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.35 : 1,779.53 = 320.66 : x
  2. Step 2: Convert to fraction form
    1,186.35/1,779.53 = 320.66/x
  3. Step 3: Cross multiply
    1,186.35x = 1,779.53 × 320.66
  4. Step 4: Simplify right side
    1,186.35x = 570,624.09
  5. Step 5: Solve for x
    x = 570,624.09/1,186.35
  6. Step 6: Final answer
    x = 480.99

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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.