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Finding the Fourth Proportional to 1,179.93, 1,770.11 and 521.81

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Solution

The fourth proportional to 1,179.93, 1,770.11 and 521.81 is: 782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.93 : 1,770.11 = 521.81 : x
  2. Step 2: Convert to fraction form
    1,179.93/1,770.11 = 521.81/x
  3. Step 3: Cross multiply
    1,179.93x = 1,770.11 × 521.81
  4. Step 4: Simplify right side
    1,179.93x = 923,649.64
  5. Step 5: Solve for x
    x = 923,649.64/1,179.93
  6. Step 6: Final answer
    x = 782.80

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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.