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Finding the Fourth Proportional to 1,180.51, 1,770.98 and 389.92

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Solution

The fourth proportional to 1,180.51, 1,770.98 and 389.92 is: 584.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.51 : 1,770.98 = 389.92 : x
  2. Step 2: Convert to fraction form
    1,180.51/1,770.98 = 389.92/x
  3. Step 3: Cross multiply
    1,180.51x = 1,770.98 × 389.92
  4. Step 4: Simplify right side
    1,180.51x = 690,531.67
  5. Step 5: Solve for x
    x = 690,531.67/1,180.51
  6. Step 6: Final answer
    x = 584.94

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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.