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Finding the Fourth Proportional to 1,180.72, 1,770.22 and 555.80

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Solution

The fourth proportional to 1,180.72, 1,770.22 and 555.80 is: 833.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,180.72 : 1,770.22 = 555.80 : x
  2. Step 2: Convert to fraction form
    1,180.72/1,770.22 = 555.80/x
  3. Step 3: Cross multiply
    1,180.72x = 1,770.22 × 555.80
  4. Step 4: Simplify right side
    1,180.72x = 983,888.28
  5. Step 5: Solve for x
    x = 983,888.28/1,180.72
  6. Step 6: Final answer
    x = 833.30

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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.