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Finding the Fourth Proportional to 1,186.17, 1,777.69 and 775.09

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Solution

The fourth proportional to 1,186.17, 1,777.69 and 775.09 is: 1,161.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.17 : 1,777.69 = 775.09 : x
  2. Step 2: Convert to fraction form
    1,186.17/1,777.69 = 775.09/x
  3. Step 3: Cross multiply
    1,186.17x = 1,777.69 × 775.09
  4. Step 4: Simplify right side
    1,186.17x = 1,377,869.74
  5. Step 5: Solve for x
    x = 1,377,869.74/1,186.17
  6. Step 6: Final answer
    x = 1,161.61

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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.