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Finding the Fourth Proportional to 1,186.81, 1,780.49 and 365.08

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Solution

The fourth proportional to 1,186.81, 1,780.49 and 365.08 is: 547.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.81 : 1,780.49 = 365.08 : x
  2. Step 2: Convert to fraction form
    1,186.81/1,780.49 = 365.08/x
  3. Step 3: Cross multiply
    1,186.81x = 1,780.49 × 365.08
  4. Step 4: Simplify right side
    1,186.81x = 650,010.56
  5. Step 5: Solve for x
    x = 650,010.56/1,186.81
  6. Step 6: Final answer
    x = 547.70

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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.